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Infleqtion is on a mission to commercialize atom-based quantum technologies that deliver orders-of-magnitude improvements in sensing and computing applications. As a deep-tech startup, we embrace a results-driven, fast-paced, and customer-focused approach to innovation. We are seeking self-motivated, energetic individuals with exceptional problem-solving and technical skills to help drive our Quantum Computing mission forward. We encourage applications from experimental physicists with expertise in Atomic, Molecular, and Optical (AMO) physics, particularly those with experience in the coherent control of quantum systems such as ultracold atoms, trapped ions, and diamond NV centers.

Role and Responsibilities

The responsibilities below represent the core scope of the role and may evolve based on business and program needs. This is a hands-on technical leadership role. Staff Quantum Physicists at Infleqtion remain deeply engaged in system development and operation while also providing technical direction, developing team members, and, where applicable, managing a small team. Depending on program needs, a Staff Quantum Physicist may lead the development of a hardware system or provide technical leadership across multiple teams.

• Lead the design, integration, calibration, operation, and improvement of neutral-atom quantum computing systems and critical subsystems.
• Translate program goals into technical requirements, experimental plans, performance targets, and technical direction across quantum processor design, Rydberg excitation, gate protocols, laser systems, calibration, and system integration.
• Design and analyze experiments and physics-based models to improve gate fidelity, stability, availability, and processor performance; guide architecture and engineering tradeoffs.
• Own critical systems through validation, troubleshooting, performance tuning, reliability improvement, and documentation; translate complex R&D objectives into prioritized work and drive cross-functional delivery.
• Develop Python-based tools in Linux environments for experiment control, data analysis, calibration, automation, and operational support.
• Review technical work and uphold team standards and best practices.
• Manage up to six direct reports, including expectations, performance, coaching, and career development.
• Contribute to hiring, proposals, intellectual property, technical roadmaps, and external technical discussions

Requirements

• PhD in atomic, optical, AMO, quantum physics, or a related field, or equivalent professional experience; typically 5+ years of relevant post-PhD experience or comparable experience leading complex quantum, atomic, optical, or precision-measurement systems.
• Deep hands-on experience designing, operating, or improving complex AMO or coherent-control experiments, with strong knowledge of atom-light interactions and technologies such as lasers, optical systems, acousto-optic or electro-optic modulators, RF instrumentation, and ultra-high-vacuum systems.
• Proficiency with Python for experiment control, data analysis, automation, or hardware integration, plus working knowledge of Linux, command-line tools, and version control.
• Demonstrated ability to turn ambiguous technical goals into executable plans and validated outcomes, lead system-level work across disciplines, and communicate effectively with specialist and non-specialist audiences.

 It is a plus if you have:

• Experience with neutral-atom quantum computing, Rydberg physics, optical-tweezer arrays, quantum-gate characterization and optimization, or related processor architectures; familiarity with physical error mechanisms and quantum-error-correction requirements.
• Experience with advanced laser and optical systems, including short-wavelength lasers, beam delivery and shaping, optical projection, high-NA imaging, noise mitigation, feedback control, and subsystem stabilization.
• Experience integrating optical, electronic, vacuum, control, and software subsystems into complex experimental platforms.
• Demonstrated technical leadership through mentoring, cross-team coordination, and delivery of complex technical programs; experience contributing to proposals, patents, roadmaps, customer discussions, or government-funded R&D.

Note

This position may require access to information protected under U.S. export control laws and regulations for quantum computing technology. Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license.

WORKING CONDITIONS and PHYSICAL REQUIREMENTS

Work will normally be performed in an office and laboratory environment and around technical equipment including computers and lasers.  We ask that candidates be able to efficiently use automated office equipment such as laptops, copiers, and printers; able to effectively engage in communications (via phone, computer, or in-person).  Any required Personal Protective Equipment will be provided and must be properly used in accordance with company requirements.

TRAVEL

Up to 10% travel may be required.

Benefits

• Salary Range: per year $190,000 - $230,000
• 100% company-paid medical, dental, vision, short/long-term disability  
• Employer-funded Health Savings Account  
• Unlimited PTO  
• 401(k) match  
• Company-paid Life and AD&D Insurance  
• Flexible Savings Account  
• Paid FMLA, Maternity/Paternity Leave  
• Employee Assistance Program  
• Student Loan Repayment 
• Equity Program

 

Notice to Recruitment Agencies:

Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.

Help Infleqtion build the future of quantum in Illinois. We are on a mission to commercialize atom-based quantum technologies that deliver orders-of-magnitude improvements in sensing and computing applications. As a deep-tech startup, we embrace a results-driven, fast-paced, and customer-focused approach to innovation. 

We are deploying a neutral-atom quantum computer in Chicago and are seeking a leader to build, manage, and develop the team that will bring it to life. You will lead the hardware team’s technical execution and people’s development. You will collaborate with our facilities and project management personnel to help the new team succeed at our new Chicago quantum hardware lab. 

Your primary responsibility will be to enable a talented team to succeed. You will set up technical priorities, shape and ratify high-impact technical decisions, coach and develop team members, and create an environment where physicists and engineers can do their best work. You will also partner with experts across Infleqtion to advance our neutral-atom quantum computing systems. 

We value demonstrated people leadership, sound judgment, and the ability to deliver through a team above any single technical specialization. A strong scientific or engineering foundation is essential, along with the curiosity and credibility to lead experts working on complex quantum systems. 

For candidates excited to make Chicago their next home, we are willing to provide relocation assistance for the right candidate. 

Role and Responsibilities 

This is a quantum hardware leadership and people-management role with technical oversight. You will be accountable for team performance, employee development, and execution at our new Chicago lab, while remaining close enough to the technical work to guide decisions and remove obstacles. Responsibilities may evolve as the effort grows, and the program needs to change. 

Lead the Chicago Quantum Systems Team, Guide Technical Development, and Deliver Results 

• Lead the hardware team launching Infleqtion’s Chicago quantum computer. Establish and maintain effective working practices and operational readiness, and reinforce Infleqtion’s culture of accountability, inclusion, scientific rigor, and open communication. 

• Manage up to six direct reports, setting clear expectations and providing regular feedback, performance management, coaching, and career development. 

• Help hire and onboard physicists and engineers, building a team with complementary strengths. 

• Represent the Chicago hardware team within Infleqtion and coordinate its work with the Chicago quantum software team and across the broader Computing organization. 

• Lead the team’s development, integration, commissioning, and operation of neutral-atom quantum computing systems, drawing on specialists’ expertise to guide technical decisions and improve processor performance, including gate fidelity, stability, availability, and reliability. 

• Ensure the team uses rigorous approaches to experimentation, validation, troubleshooting, and system operation. 

• Contribute to technical roadmaps, proposals, intellectual property, and external technical discussions. 

• Participate directly in technical problem-solving when needed, while maintaining primary focus on leading and developing the team. 

• Work closely with project managers to translate program goals into clear priorities, achievable milestones, staffing needs, and coordinated work plans; identify and track risks and resolve obstacles. 

Requirements

• Demonstrated success managing and developing technical teams, including direct responsibility for goal setting, performance feedback, coaching, and career growth. 

• Experience leading complex experimental hardware projects from ambiguous objectives to measurable results. 

• Ability to build trust, delegate effectively, address challenges constructively, and bring together people with different areas of expertise. 

• Strong planning and execution skills, including prioritizing work, managing competing demands, and coordinating across disciplines. 

• Clear communication with both specialist and non-specialist audiences. 

• A strong technical foundation in quantum physics, atomic, molecular, and optical (AMO) physics or a related field, sufficient to guide technical discussions and evaluate tradeoffs. 

• A PhD in a relevant scientific or engineering discipline, or equivalent professional experience; typically, five or more years of relevant post-PhD experience or comparable experience leading complex scientific or engineering systems. 

We recognize that strong leaders bring different technical backgrounds. Candidates do not need expertise in every subsystem listed below; the ability to lead specialists, ask thoughtful questions, and support sound technical decisions is essential. 

It Is a Plus If You Have 

• Experience establishing a new laboratory, opening a technical office, or growing a research and development team. 

• Experience with neutral-atom quantum computing, Rydberg physics, optical-tweezer arrays, quantum-gate characterization, or related processor architectures. 

• Experience with coherent control of quantum systems, including ultracold atoms, trapped ions, or diamond NV centers. 

• Familiarity with lasers, optical systems, RF instrumentation, ultra-high-vacuum systems, and the integration of complex experimental platforms. 

• Familiarity with Python, Linux, and tools for experiment control, data analysis, calibration, and automation. 

• Experience contributing to proposals, patents, technical roadmaps, customer discussions, or government-funded R&D. 

Why This Opportunity 

• Build something from the beginning: Help shape a new Chicago quantum hardware team, including its team culture and ways of working. 

• Make an impact through people: Develop talented scientists and engineers and give them direction and support to succeed. 

• Advance quantum computing: Lead a team translating ambitious research into increasingly capable and reliable systems. 

• Make Chicago your next chapter: Relocation assistance is available for the right candidate who wants to move to Chicago. 

Note 

This position may require access to information protected under U.S. export control laws and regulations for quantum computing technology. Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license. 

Working Conditions and Physical Requirements 

Work will normally be performed in an office and laboratory environment and around technical equipment including computers and lasers. We ask that candidates be able to efficiently use automated office equipment such as laptops, copiers, and printers; able to effectively engage in communications (via phone, computer, or in-person). Any required Personal Protective Equipment will be provided and must be properly used in accordance with company requirements. 

Travel 

Up to 10% travel may be required. 

Benefits

• Salary Range: per year $190,000 - $230,000
• 100% company-paid medical, dental, vision, short/long-term disability  
• Employer-funded Health Savings Account  
• Unlimited PTO  
• 401(k) match  
• Company-paid Life and AD&D Insurance  
• Flexible Savings Account  
• Paid FMLA, Maternity/Paternity Leave  
• Employee Assistance Program  
• Student Loan Repayment 
• Equity Program

 

Notice to Recruitment Agencies:

Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.

Junior Medical Physicist

Valdosta, GA | Full-Time, Direct Hire | $175,000 Annually

Blue United Sourcing is seeking a Junior Medical Physicist to join its established Radiation Oncology team. This opportunity is ideal for a physicist who has completed ABR Part 1, has completed or is well advanced in residency, and is ready to continue progressing toward full board certification while working alongside an experienced ABR-certified physicist.

The Junior Radiation Physicist will work alongside an experienced, ABR-certified physicist and collaborate closely with radiation oncologists, dosimetrists, radiation therapists, and other members of the oncology team. The role supports the safe and accurate delivery of radiation therapy through treatment planning, dosimetry, equipment calibration, quality assurance, radiation safety, and regulatory compliance.

At a Glance

Schedule: Monday–Friday, 40 hours per week

Hours: Primarily 7:30 a.m.–4:00 p.m., with some scheduling flexibility

Weekends: None

Call: None

Setting: Outpatient comprehensive cancer center

Salary: $175,000 annually

ABR: Part 1 completed; candidate must be progressing toward certification

The Opportunity

As part of the Radiation Oncology team, the Junior Medical Physicist will support the safe and accurate delivery of radiation therapy across a diverse adult oncology population. You will work closely with radiation oncologists, dosimetrists, radiation therapists, and an experienced medical physicist in an environment where the clinical disciplines work collaboratively throughout the treatment process.

The center treats prostate, breast, lung, head and neck, brain, liver, SRS, SBRT, and other adult oncology cases.

What You'll Be Doing

• Calibrate radiation therapy equipment and verify safe and accurate operation.
• Perform and verify calculations for external beam radiation therapy and brachytherapy.
• Perform and document required clinical dosimetry.
• Participate in radiation surveys, leak testing, and radioactive source testing.
• Support quality assurance activities for external beam therapy and brachytherapy.
• Assist with radiation equipment maintenance oversight and service documentation.
• Support compliance with NRC, ACR, state, and other applicable regulatory standards.
• Participate in the development and review of medical physics policies and procedures.
• Maintain accurate clinical and quality assurance documentation.
• Provide radiation safety education and support to hospital personnel.
• Collaborate with the clinical team on treatment planning, patient safety, and continuous quality improvement.

Your Clinical Environment

The department operates with:

• Two matched Elekta Versa HD linear accelerators

• Vision RT surface-guided radiation therapy
• Large-bore 4D CT simulator
• Elekta Mosaic integrated with EPIC
• Treatment planning transitioning from Pinnacle to Elekta Monaco
• Hexapod six-degree-of-freedom technology

Elekta experience is preferred, but permanent hires may be trained on the facility’s equipment.

The Team

You’ll be joining a multidisciplinary cancer center where medical oncology, radiation oncology, laboratory, pharmacy, research, social work, dietary services, and cancer registry services are located within the same center.

The department currently has an experienced, ABR-certified physicist on staff. Candidates should have completed ABR Part 1 and completed their residency or be sufficiently advanced in their residency and certification process, as the facility is unable to support a full residency program.

Requirements

What You'll Bring

• Graduate degree in Medical Physics preferred; an appropriate graduate degree in a related physical science may also be considered.
• Successful completion of ABR Part 1.
• Medical Physics residency completed or sufficiently advanced to continue toward ABR certification.
• Board eligible for ABR or ABMP certification.
• Knowledge of radiation therapy equipment calibration, treatment planning, dosimetry, quality assurance, and radiation safety.
• Strong attention to accuracy, documentation, and patient safety.
• Effective communication and interpersonal skills.
• Current healthcare provider CPR certification.

Benefits

Why Consider This Opportunity?

Join a collaborative Radiation Oncology team where medical physics plays an integral role in treatment quality and patient safety. You will have the opportunity to work alongside an experienced ABR-certified physicist while continuing to develop professionally and progress toward full board certification.

The position offers a consistent weekday schedule with no weekends and no call, within a comprehensive cancer center where the oncology disciplines work closely together to provide coordinated patient care.

In addition to joining an established oncology team, this opportunity offers:

• Monday–Friday day-shift schedule
• No weekends
• No call
• 401(k) with employer match
• Paid Time Off
• Low healthcare insurance premiums
• Company-paid life insurance
• Short- and long-term disability
• Tuition reimbursement
• On-the-job training and skills development
• Career growth and advancement opportunities

Human-First Hiring.

When you apply, your resume will always be reviewed by our team of real recruiters — not an AI screening bot. 

MILITARY VETERANS & MILITARY SPOUSES — YOU BELONG HERE

Blue United Sourcing is a Veteran-Owned Small Business, and we actively recruit from the military community. You are strongly encouraged to apply.

Don't fit the criteria for this role? Join our Talent Network to be matched with future job openings that fit your experience and career goals.

Blue United Sourcing is proud to be a Veteran-Owned Small Business.

Learn more: (url removed)

Follow us on LinkedIn.

Infleqtion is on a mission to commercialize atom-based quantum technologies that deliver orders-of-magnitude improvements in sensing and computing applications. As a deep-tech startup, we embrace a results-driven, fast-paced, and customer-focused approach to innovation. We are seeking self-motivated, energetic individuals with exceptional problem-solving and technical skills to help drive our Quantum Computing mission forward. We encourage applications from experimental physicists with expertise in Atomic, Molecular, and Optical (AMO) physics, particularly those with experience in the coherent control of quantum systems such as ultracold atoms, trapped ions, and diamond NV centers. 

Role and Responsibilities 

• Design, integrate, calibrate, operate, and improve neutral-atom quantum computing systems and critical subsystems. 

• Lead R&D projects involving quantum processor hardware, quantum-gate protocols, laser and optical systems, calibration, control, or system integration. 

• Translate program goals into technical requirements, experimental plans, and measurable performance targets. 

• Design and analyze experiments and physics-based models to identify performance limitations and guide technical decisions. 

• Independently own critical systems through development, validation, troubleshooting, reliability improvement, and routine operation. 

• Develop Python-based tools for experiment control, data analysis, calibration, automation, and hardware integration. 

• Collaborate across physics, software, electrical, mechanical, and systems-engineering teams. 

• Mentor junior team members and interns and contribute to technical reviews and team best practices. 

Requirements

• PhD in atomic, optical, AMO, quantum physics, or a related field plus at least two years of relevant post-PhD experience, or comparable professional experience developing complex experimental systems.  

• Hands-on experience designing, building, and operating complex AMO, quantum-control, or precision-measurement experiments.  

• Experience applying quantitative atomic or optical physics models to experimental design or to the specification of laser, optical, RF, or control systems.  

• Hands-on experience with lasers and optical systems, together with related technologies such as acousto-optic or electro-optic modulators, RF instrumentation, imaging systems, or ultra-high-vacuum equipment.  

• Experience using Python for experiment control, data analysis, automation, or hardware integration.  

• Evidence of independently leading a substantial experimental project or owning a critical technical subsystem. 

It is a plus if you have: 

• Experience with neutral-atom quantum computing, Rydberg physics, optical-tweezer arrays, or quantum-gate characterization. 

• Experience with advanced laser systems, optical beam delivery, high-NA imaging, beam shaping, or optical projection. 

• Experience characterizing and mitigating laser-frequency, phase, pointing, or intensity noise. 

• Experience with analog electronics, RF systems, or feedback control. 

• Experience integrating optical, electronic, vacuum, control, and software subsystems. 

• Experience developing automated calibration, health-monitoring, or experimental test infrastructure. 

• Familiarity with Linux, Git, command-line tools, and collaborative software-development practices. 

If you do not meet the qualifications for this role, consider applying to our intermediate-level position (Quantum Physicist)

Note 

This position may require access to information protected under U.S. export control laws and regulations for quantum computing technology. Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license. 

WORKING CONDITIONS and PHYSICAL REQUIREMENTS 

Work will normally be performed in an office and laboratory environment and around technical equipment including computers and lasers.  We ask that candidates be able to efficiently use automated office equipment such as laptops, copiers, and printers; able to effectively engage in communications (via phone, computer, or in-person).  Any required Personal Protective Equipment will be provided and must be properly used in accordance with company requirements. 

TRAVEL 

Up to 10% travel may be required. 

NOTE: Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes. 

Benefits

• Salary Range: per year 165,000 - 205,000
• 100% company-paid medical, dental, vision, short/long-term disability  
• Employer-funded Health Savings Account  
• Unlimited PTO  
• 401(k) match  
• Company-paid Life and AD&D Insurance  
• Flexible Savings Account  
• Paid FMLA, Maternity/Paternity Leave  
• Employee Assistance Program  
• Student Loan Repayment 
• Equity Program

 

Notice to Recruitment Agencies:

Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.

Infleqtion is on a mission to commercialize atom-based quantum technologies that deliver orders-of-magnitude improvements in sensing and computing applications. As a deep-tech startup, we embrace a results-driven, fast-paced, and customer-focused approach to innovation. We are seeking self-motivated, energetic individuals with exceptional problem-solving and technical skills to help drive our Quantum Computing mission forward. We encourage applications from experimental physicists with expertise in Atomic, Molecular, and Optical (AMO) physics, particularly those with experience in the coherent control of quantum systems such as ultracold atoms, trapped ions, and diamond NV centers.

Role and Responsibilities

The responsibilities below represent the core scope of the role and may evolve based on business and program needs. This is a hands-on technical leadership role. Staff Quantum Physicists at Infleqtion remain deeply engaged in system development and operation while also providing technical direction, developing team members, and, where applicable, managing a small team. Depending on program needs, a Staff Quantum Physicist may lead the development of a hardware system or provide technical leadership across multiple teams.

• Lead the design, integration, calibration, operation, and improvement of neutral-atom quantum computing systems and critical subsystems.
• Translate program goals into technical requirements, experimental plans, performance targets, and technical direction across quantum processor design, Rydberg excitation, gate protocols, laser systems, calibration, and system integration.
• Design and analyze experiments and physics-based models to improve gate fidelity, stability, availability, and processor performance; guide architecture and engineering tradeoffs.
• Own critical systems through validation, troubleshooting, performance tuning, reliability improvement, and documentation; translate complex R&D objectives into prioritized work and drive cross-functional delivery.
• Develop Python-based tools in Linux environments for experiment control, data analysis, calibration, automation, and operational support.
• Review technical work and uphold team standards and best practices.
• Manage up to six direct reports, including expectations, performance, coaching, and career development.
• Contribute to hiring, proposals, intellectual property, technical roadmaps, and external technical discussions.

Requirements

• PhD in atomic, optical, AMO, quantum physics, or a related field, or equivalent professional experience; typically 5+ years of relevant post-PhD experience or comparable experience leading complex quantum, atomic, optical, or precision-measurement systems.
• Deep hands-on experience designing, operating, or improving complex AMO or coherent-control experiments, with strong knowledge of atom-light interactions and technologies such as lasers, optical systems, acousto-optic or electro-optic modulators, RF instrumentation, and ultra-high-vacuum systems.
• Proficiency with Python for experiment control, data analysis, automation, or hardware integration, plus working knowledge of Linux, command-line tools, and version control.
• Demonstrated ability to turn ambiguous technical goals into executable plans and validated outcomes, lead system-level work across disciplines, and communicate effectively with specialist and non-specialist audiences.

 It is a plus if you have:

• Experience with neutral-atom quantum computing, Rydberg physics, optical-tweezer arrays, quantum-gate characterization and optimization, or related processor architectures; familiarity with physical error mechanisms and quantum-error-correction requirements.
• Experience with advanced laser and optical systems, including short-wavelength lasers, beam delivery and shaping, optical projection, high-NA imaging, noise mitigation, feedback control, and subsystem stabilization.
• Experience integrating optical, electronic, vacuum, control, and software subsystems into complex experimental platforms.
• Demonstrated technical leadership through mentoring, cross-team coordination, and delivery of complex technical programs; experience contributing to proposals, patents, roadmaps, customer discussions, or government-funded R&D.

Note

This position may require access to information protected under U.S. export control laws and regulations for quantum computing technology. Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license.

WORKING CONDITIONS and PHYSICAL REQUIREMENTS

Work will normally be performed in an office and laboratory environment and around technical equipment including computers and lasers.  We ask that candidates be able to efficiently use automated office equipment such as laptops, copiers, and printers; able to effectively engage in communications (via phone, computer, or in-person).  Any required Personal Protective Equipment will be provided and must be properly used in accordance with company requirements.

TRAVEL

Up to 10% travel may be required.

Benefits

The targeted salary range for this role is $166,000 to $256,000 on an annualized basis plus eligibility to participate in our annual incentive plan.

In addition to your base compensation, we offer a generous Total Rewards program which includes:

• 100% company paid Employee coverage for Medical, Dental, Vision, and Short/Long Term Disability insurance programs
• Employer funded Health Savings Account
• Unlimited Paid Time Off
• 401(k) Matching Programs
• Company paid Life and AD&D Insurance
• Flexible Healthcare Savings Account
• Paid FMLA Leave
• Paid Maternity/Paternity Leave
• Employer Assistance Program
• Student Loan Repayment

Equal Opportunity

Here you have freedom to embrace your whole self: who you love, your gender identity and expression, skin color, age, appearance, disability, neurodiversity, DNA, military/veteran status, citizenship, and other factors that make up who you are. Your uniqueness is valued, welcomed, and appreciated here. We are dedicated to providing a positive workplace and base all employment decisions on your qualifications, performance, merits, as well as business needs. We are proud to be an Equal Employment Opportunity Employer.

Contact Information

If this opportunity interests you and you fit the job description, please submit an application. If you need assistance or an accommodation due to disability, please feel free to contact us at (url removed).

Notice to Recruitment Agencies:

Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.

Infleqtion is a global quantum technology company solving the world's most challenging problems. The company harnesses neutral atom quantum technology to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables "quantum everywhere" through our ecosystem of devices and platforms. We are recruiting for a Staff Quantum Sensor Physicist to help translate customer needs into practical architectures and devices for deployable atom-based inertial and gravitational sensors.

JOB RESPONSIBILITIES

The duties and responsibilities outlined below include essential functions of the role. Depending on business needs, this role may perform a combination of some or all of the following duties. Duties, responsibilities, and activities may change, or new ones may be assigned at any time with or without notice.

• Participates in and/or leads research and development projects involving atom interferometry, atom-based inertial and gravitational sensing, cold-atom systems, laser systems, vacuum systems, controls, and quantum sensing systems
• Translates customer needs, use cases, and specifications into practical quantum sensor architectures, requirements, error budgets, trade studies, operating concepts, and development plans
• Leads or supports development from concept and architecture phases all the way through test, operation, and eventual deployment
• Develops and maintains physics models, simulations, calculations, and error budgets to guide architecture decisions, performance estimates, and identification of technical risks
• Evaluates sensor concepts against real-world and deployed-system constraints including sensitivity, bandwidth, dynamic range, SWaP-C, environmental robustness, manufacturability, reliability, cost, schedule, and technical risk
• Works with electrical, mechanical, software, firmware, vacuum, laser, and controls engineering teams to develop requirements, guide design trades, and convert physics concepts into buildable and operable instrument designs
• Participates in proposal development and customer technical discussions, including practical work scope, risks, system concepts, and deployment consideration.
• Communicates project findings and progress to both internal stakeholders and external customers

Requirements

• PhD in atomic physics, optical physics, quantum sensing, precision measurement, or related field
• Practical experience with atom-based inertial and/or gravitational sensors, atom interferometry, or closely related AMO or precision-measurement hardware
• Strong practical judgment in balancing physics performance against constraints such as reliability, operability, integration complexity, usability, cost, schedule, SWaP-C, environmental robustness, and technical risk
• Experience designing, building, integrating, testing, operating, and debugging complex hardware and software systems
• Experience developing models, simulations, calculations, and/or error budgets to inform instrument designs
• Ability to work effectively with engineering teams on optical, mechanical, electrical, software, firmware, vacuum, laser, controls, packaging, and instrument-operation challenges
• Professional-level communication skills, including the ability to share technical information clearly with technical and non-technical staff, leadership, and customers
• Ability to travel domestically and potentially internationally up to 10%
• Candidates must be authorized to work in the United States without current or future sponsorship

Additional Preferred Qualifications:

• Direct experience with atom interferometry, cold-atom gravimetry, gravity gradiometry, quantum inertial sensing, Bose Einstein condensates, or optical lattices
• Experience building, testing, operating, or deploying practical AMO/quantum systems, including fieldable sensors, transportable instruments, or robust laboratory prototypes
• Experience with cold or ultracold atoms, Bose-Einstein condensates, MOTs, optical lattices, or related technologies
• Demonstrated ability to translate customer needs or performance goals into implementable system architectures, requirements, engineering trades, and test approaches
• Experience writing proposals, leading technical work, serving as a Principal Investigator (PI) or technical lead, and/or working directly with customers
• 5+ years of post-PhD experience in a postdoctoral role, quantum-related industry, precision measurement, or related hardware development environment

NOTE

This position may require access to information protected under U.S. export control laws and regulations for quantum computing technology. Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license.

WORKING CONDITIONS and PHYSICAL REQUIREMENTS

Work will normally be performed in an office and laboratory environment and around technical equipment including computers and lasers.  We ask that candidates be able to efficiently use automated office equipment such as laptops, copiers, and printers; able to effectively engage in communications (via phone, computer, or in-person).  Any required Personal Protective Equipment will be provided and must be properly used in accordance with company requirements.

TRAVEL

Up to 10% travel may be required.

Notice to Recruitment Agencies:

Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.

Benefits

The targeted salary range for this role is $166,000 to $256,000 on an annualized basis plus eligibility to participate in our annual incentive plan.

In addition to your base compensation, we offer a generous Total Rewards program which includes:

• 100% company paid Employee coverage for Medical, Dental, Vision, and Short/Long Term Disability insurance programs
• Employer funded Health Savings Account
• Unlimited Paid Time Off
• 401(k) Matching Programs
• Company paid Life and AD&D Insurance
• Flexible Healthcare Savings Account
• Paid FMLA Leave
• Paid Maternity/Paternity Leave
• Employer Assistance Program
• Student Loan Repayment

Equal Opportunity

Here you have freedom to embrace your whole self: who you love, your gender identity and expression, skin color, age, appearance, disability, neurodiversity, DNA, military/veteran status, citizenship, and other factors that make up who you are. Your uniqueness is valued, welcomed, and appreciated here. We are dedicated to providing a positive workplace and base all employment decisions on your qualifications, performance, merits, as well as business needs. We are proud to be an Equal Employment Opportunity Employer.

Contact Information

If this opportunity interests you and you fit the job description, please submit an application. If you need assistance or an accommodation due to disability, please feel free to contact us at (url removed).

Infleqtion is on a mission to commercialize atom-based quantum technologies that deliver orders-of-magnitude improvements in sensing and computing applications. As a deep-tech startup, we embrace a results-driven, fast-paced, and customer-focused approach to innovation. We are seeking self-motivated, energetic individuals with exceptional problem-solving and technical skills to help drive our Quantum Computing mission forward. We encourage applications from experimental physicists with expertise in Atomic, Molecular, and Optical (AMO) physics, particularly those with experience in the coherent control of quantum systems such as ultracold atoms, trapped ions, and diamond NV centers.

Role and responsibilities

• Design, build, calibrate and maintain Quantum Computers based on neutral atoms.
• Participate and/or lead Research and Development projects for laser systems, Quantum Processing Units, quantum gate protocols, etc. for Quantum Computers.
• Create, test, and validate mathematical models of atomic physics behavior, and use the results to inform system design by translating high-level system requirements into specialized engineering subsystems.
• Self-start and successfully execute on a new R&D activity given a well-defined goal and constraints (e.g. resources, timeframe): gather requirements from stakeholders, drive definition of solution space, drive project execution.
• Develop, test, run, and debug software for conducting experiments and system tuning in production.
• Design, assemble, and test laser and optical systems.
• Ownership of subsystems to maintain high availability and high performance.
• Mentor and teach junior team members as indirect reports. Supervise interns.

Requirements

• PhD in atomic physics, optical physics, or related field; or equivalent related professional experience (4+ years); If you have substantially more experience than this and are excited to apply, please do! We will also consider hiring at the Senior Quantum Physicist level.
• Proficiency in using tools commonly found in an atomic physics lab, such as lasers, acousto-optic modules, RF signal generators and analyzers, and ultra-high-vacuum systems.
• Proficiency in writing Python code for running physics experiments.
• Proficiency in calculating atom-light interaction for input laser specifications.
• Excellent verbal and written communication skills, ability to effectively share information with technical and non-technical staff at all levels of company hierarchy.
• Excellent collaboration skills, ability to work in an agile efficient team environment where engagement, feedback, and participation are an expected part of successful job performance.
• Demonstrated problem solving skills and fast learning rate.
• Ability to work both autonomously—taking high-level goals as input to develop and execute an optimal plan while gathering necessary resources—and collaboratively, by soliciting and incorporating input from colleagues.

 It is a plus if you have:

• Experience in operating high power CW laser (> 1 Watt) and/or short-wavelength visible laser (< 500 nm) and designing their laser power delivery systems
• Experience with characterization and mitigation of laser frequency and intensity noise
• Experience with analog electronics and use of servo loops for laser and subsystem stabilization
• Experience with image projection through a high numerical aperture (NA) imaging system
• Experience in integrating heterogeneous subsystems for a complex physics experiment
• Familiarity with Git, Linux, and command line interface (CLI) tools
• Enthusiasm for staying up-to-date with latest developments in AMO physics and reviewing relevant papers for the team

Note

This position may require access to information protected under U.S. export control laws and regulations for quantum computing technology. Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license.

WORKING CONDITIONS and PHYSICAL REQUIREMENTS

Work will normally be performed in an office and laboratory environment and around technical equipment including computers and lasers.  We ask that candidates be able to efficiently use automated office equipment such as laptops, copiers, and printers; able to effectively engage in communications (via phone, computer, or in-person).  Any required Personal Protective Equipment will be provided and must be properly used in accordance with company requirements.

TRAVEL

Up to 10% travel may be required.

NOTE: Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.

Benefits

The targeted salary range for this role is $130,000 to $211,000 on an annualized basis plus eligibility to participate in our annual incentive plan.

In addition to your base compensation, we offer a generous Total Rewards program which includes:

• 100% company paid Employee coverage for Medical, Dental, Vision, and Short/Long Term Disability insurance programs
• Employer funded Health Savings Account
• Unlimited Paid Time Off
• 401(k) Matching Programs
• Company paid Life and AD&D Insurance
• Flexible Healthcare Savings Account
• Paid FMLA Leave
• Paid Maternity/Paternity Leave
• Employer Assistance Program
• Student Loan Repayment

Equal Opportunity

Here you have freedom to embrace your whole self: who you love, your gender identity and expression, skin color, age, appearance, disability, neurodiversity, DNA, military/veteran status, citizenship, and other factors that make up who you are. Your uniqueness is valued, welcomed, and appreciated here. We are dedicated to providing a positive workplace and base all employment decisions on your qualifications, performance, merits, as well as business needs. We are proud to be an Equal Employment Opportunity Employer.

Contact Information

If this opportunity interests you and you fit the job description, please submit an application. If you need assistance or an accommodation due to disability, please feel free to contact us at (url removed)

Notice to Recruitment Agencies:

Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.