Senior-Network-Engineer, Network-Engineer, Network-Infrastructure-Engineer Jobs

Job Title: Sr. Network EngineerJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: SecretEmployee Type: RegularPercentage of Travel Required: Up to 50%Type of Travel: Continental US* * *

The Opportunity:
CACI’s Enterprise IT (EIT) Sector is seeking a Sr Network Engineer in support of a Global Enterprise Network Modernization (GENMOD) contract.
As a Sr Network Engineer, you’ll support infrastructure modernization of unclassified and classified base area networks to include site survey, design and installation activities across ISP/OSP, network, Voice, and WAN infrastructure.

Responsibilities:

• Senior role with multi-disciplined network experience across wired, wireless, and mobile broadband solutions.

• Project Leadership & Strategy: Lead site surveys and Engineering team in the design of modernized network architecture, review and analyze network management/monitoring tools to provide network topology, configuration, and bandwidth utilization.

• Network Design & Engineering: support the creation of network architectures, topology diagrams, and data flow artifacts (Visio) for wired, wireless, and mobile broadband solutions, focusing on high availability and performance. Develop Engineering Implementation Plan (EIP), with List of Materials (LOM).

• Support development of resource loaded schedule by providing technical Level of Efforts (LOE) for survey/design/implementation.

• Participate in internal and external technical discussions and meetings as needed for multiple global time zones.

• Cybersecurity Compliance: Design, implement, and document secure network architectures, including STIG checklists, port/protocol/service documentation, and Plan of Actions and Milestones (POA&M) in compliance with DAF and DoD RMF standards.

• Quality & Safety Assurance: Ensure all installations meet industry safety standards and operational cleanliness, restoring sites to original or better condition.

• Experience designing secure networks, systems, and application architectures

• Develop and perform technical presentations for customers

• Understand and adhere to all CACI Ethical and Compliance policies

• Proactively ensure a safe work environment and adhere to CACI EH&S policies and procedures

• Perform other duties as required

• Requires travel (up to 50%)

Qualifications:
Required:

• University Degree (BA/BS) and 7+ years of related work experience

• DoD 8140 IAT II Baseline Certification (CompTIA Security+ CE or CCNA-SEC)

• Other Certifications: CCNP/JNCP or equivalent

• Must currently hold U.S. Government Secret Security Clearance.

• Experience in using drawing tools such as Microsoft Visio or AutoCAD

Desired:

• Experience supporting OCONUS Army Network

• Experience working with USFK, and US Army Network infrastructure in Korea

• CISSP

This position is contingent on funding and may not be filled immediately. However, this position is representative of positions within CACI that are consistently available. Individuals who apply may also be considered for other positions at CACI.

What You Can Expect:

A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.

Pay Range:

There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

Since this position can be worked in more than one location, the range shown is the national average for the position.

The proposed salary range for this position is:

$90,300-$189,600

CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.

Originally posted on Himalayas

Leidos is seeking a Senior Network Engineer to support Federal Civil customer in the Washington, DC metropolitan area.

LOCATION: This position is remote; however, prefer candidates that are within driving distance to the Washington, DC area.

POSITION SUMMARY:

The Senior Network Engineer will serve as a senior technical contributor responsible for designing, implementing, optimizing, and sustaining complex network solutions spanning on-premises infrastructure and hybrid cloud environments. The position requires technical expertise, independent problem-solving, and the ability to develop effective solutions to complex network challenges involving multiple technologies and technical disciplines. The successful candidate will collaborate with customer stakeholders, engineering teams, cybersecurity professionals, and program leadership to maintain network availability, performance, and security while supporting infrastructure modernization and evolving mission requirements. This role also provides technical guidance to other engineers and contributes to network architecture, engineering standards, and continuous operational improvement.

CLEARANCE REQUIREMENTS:

• Must have or able to obtain a Public Trust clearance; Must be a US Citizen.

PRIMARY RESPONSBILITIES:

• Serve as a Senior technical and escalation resource for complex network engineering and operational issues affecting mission-critical enterprise infrastructure.
• Lead the planning, design, implementation, and optimization of complex network infrastructure solutions across geographically distributed, multi-vendor environments.
• Independently analyze complex technical challenges involving multiple systems and disciplines, develop engineering solutions, and implement corrective actions that improve network reliability, performance, and security.
• Design, configure, maintain, and troubleshoot enterprise routing and switching infrastructure, including BGP, OSPF, VLANs, VRFs, routing redundancy, and network failover.
• Engineer and support enterprise network security solutions, including Cisco Firepower, Firepower Management Center (FMC), ASA, firewall policies, access controls, and security hardening.
• Design, implement, and sustain secure site-to-site and remote-access VPN solutions, including Cisco Secure Client/AnyConnect and connectivity with external partners and vendors.
• Engineer and maintain hybrid cloud network connectivity integrating on-premises infrastructure with AWS networking services, including VPCs, Direct Connect, Transit Gateway, and load balancing.
• Support enterprise wireless networking and network access control technologies, including Cisco Identity Services Engine (ISE).
• Lead technical planning and execution of network infrastructure upgrades, modernization initiatives, lifecycle replacements, and security remediation activities.
• Evaluate network performance, availability, capacity, and emerging technical requirements; recommend and implement improvements to strengthen service delivery and operational resilience.
• Lead complex incident investigations and root cause analysis, identifying systemic issues and developing sustainable corrective and preventive solutions.
• Collaborate with customer representatives, program leadership, cybersecurity teams, vendors, and service providers to assess requirements, develop technical solutions, and influence network engineering decisions.
• Develop and maintain network architecture documentation, configuration standards, technical implementation plans, and operational procedures.
• Support incident, problem, change, and service request management processes while ensuring technical accuracy, documentation, and operational accountability.
• Provide technical mentorship, peer review, and engineering guidance to junior and mid-level network engineers.
• Identify opportunities for network automation, standardization, and process improvement to increase operational efficiency, reliability, and security.

BASIC QUALIFICATIONS:

• Bachelor's degree in Information Technology, Computer Science, Engineering, or a related technical field with 8+ years of relevant network engineering experience; additional education and experience equivalencies may be considered.
• Advanced hands-on experience designing, implementing, administering, and troubleshooting complex enterprise network infrastructure in production environments.
• Expert-level knowledge of enterprise routing and switching technologies, including BGP, OSPF, VLANs, VRFs, and network redundancy and failover.
• Demonstrated experience developing and implementing technical solutions to complex network problems involving multiple systems, technologies, or engineering disciplines.
• Hands-on experience configuring, maintaining, and troubleshooting enterprise network security infrastructure, including firewalls, access control policies, and VPN connectivity.
• Experience supporting Cisco and/or Juniper enterprise networking platforms in complex, multi-vendor environments.
• Experience designing, implementing, or supporting hybrid cloud network connectivity between on-premises infrastructure and AWS environments.
• Demonstrated experience independently leading complex network troubleshooting, root cause analysis, and corrective action efforts.
• Experience planning and executing network infrastructure changes, upgrades, and security remediation activities in production environments.
• Demonstrated ability to develop technical recommendations, communicate complex technical information, and collaborate with customer stakeholders, engineering teams, vendors, and service providers.
• Experience producing and maintaining network diagrams, technical documentation, configuration standards, and implementation procedures.
• Strong communication skills, with experience collaborating directly with customers, vendors, and ISPs to support network design, troubleshooting, and issue resolution.
• Hands-on experience with Juniper EX/QFX & Junos OS, Cisco ISR & IOS devices, ASA, Firepower & FMC.
• Demonstrated experience with routing/switching protocols (e.g., BGP, `OSPF, VRF) and core infrastructure services.
• Hands-on experience managing AWS network infrastructure and hybrid cloud connectivity (e.g., VPC, direct-connect, transit gateways, load balancers) between on-prem and cloud environments.
• Experience with remote access VPN solutions, including Cisco AnyConnect/Secure Client configuration and support.
• Experience with virtual computing/virtualization platforms (e.g., VMware/vSphere) as they relate to network design and connectivity.
• Experience with wireless infrastructure and NAC solutions (e.g., Cisco ISE).
• Experience with Cisco CUCM/UC voice solutions.
• Able to obtain a baseline 8140 certification [(IAT Level II) CCNA-Security, CySA+, GICSP, GSEC, Security+ CE, CND, SSCP] within 90 days.

PREFERRED QUALIFICATIONS:

• Cisco Certified CCNA

• Cisco Certified CCNP or Juniper JNCIP-ENT.
• Experience with Cisco Meraki wireless solutions.
• Experience with Cisco ISE.
• Experience with Dell switches and OS10.
• Experience with ServiceNow.
• Security+ CE certification.

***Candidates selected for an interview should note that it will be conducted live via video, with cameras on at all times. As part of our identity verification process, a photo will be taken during the interview to confirm your identity and help protect against fraud. At hire, candidates complete formal identity verification.***

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

October 15, 2026

Pay Range:

Pay Range $92,300.00 - $166,850.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Originally posted on Himalayas