Network Engineer

Leidos; Arlington (VA); On-site; USD 92,000 - 167,000; Full time

Job summary

Leidos' Digital Modernization group seeks a Senior Network Engineer to design, migrate, implement, enhance, optimize, and maintain infrastructure for the CESO program in Arlington, VA. On-site with occasional travel, U.S.

citizenship and TS/SCI clearance with CI Poly eligibility are required. Responsibilities include network integration, architecture development, vendor coordination, and ongoing operations in a DoD-focused environment.

Qualifications

• BS degree and 8–12 years of prior relevant experience or Masters with 6–10 years of prior relevant experience.
• Active DOD TS/SCI clearance and eligibility to obtain/ maintain CI Poly.
• IAT Level II baseline certification (e.g. CCNA Security, CySA+, GICSP, GSEC, Security+ CE, CND, SSCP).
• Ability to translate highly technical matters to a non‑technical audience.
• Excellent communication skills.
• Technical depth in network services and architecture (WAN/LAN/VPN).
• Experience with Cisco Switches and Routers, DMVPNs, BGP, AWS networking, VPCs, Route 53, and AWS Firewall Services.
• Knowledge of ITIL Foundation and security best practices.

Responsibilities

• Provide technical expertise and assist with network integration and consolidation across multiple systems environments.
• Prepare and review technical implementation plans with milestones, timelines, and critical paths.
• Address and resolve technical problems during installation and upgrades of network hardware and systems.
• Interface with customers, vendors, and other technical staff to analyze requirements (e.g., new circuits).
• Develop and document technical briefings, engineering standards, SOPs, and status reports for senior leadership.
• Participate in network architecture development and design changes.
• Evaluate current and emerging technologies and make recommendations.
• Collaborate with partners to de-conflict efforts and enhance efficiency and operability.
• Communicate with customers on matters of significant importance.
• Complete projects and tasks effectively.

Skills

Network engineering

WAN/LAN

Security concepts

Communications

Education

BS degree (or higher) in a technical field

Master's degree in IT or related field

Tools

Cisco switches/routers

S2S connections

DMVPNs

BGP routing

Palo Alto Firewalls

AWS networking (VPCs)

Route 53

AWS Firewall Services

Job description

Description

Leidos' Digital Modernization group is seeking a Senior Network Engineer to be responsible for the design, migration, implementation, enhancement, optimization, and maintenance of infrastructure in support of the Compartmented Enterprise Services Office (CESO) program.

With the CESO program, the Defense Information System Agency (DISA) is looking to transform the existing Secure Web Services (SWS) environment, which provides secure information sharing to the community, into a more mature service offering to meet the DoD and intelligence communities. As part of this task order, Leidos will manage the commercial cloud migration and disestablishment of legacy systems, fully automate the continuous development & continuous integration environment, fourth estate consolidation, professionalize services – ITIL/DevSecOps based processes, improve the customer experience 1st call resolution, and achieve development of a service catalog for Defense Working Capital Fund (DWCF) Model.

This position is in Arlington, VA 100% on-site with occasional/situational travel.

U.S. citizenship with an active TS/SCI clearance and ability to obtain a CI Poly is required.

Primary Responsibilities:

• Provide technical expertise and assist with network integration and consolidation efforts across multiple systems environments.
• Prepare and review technical implementation plans to provide integrated solutions, including actions, milestones, timelines and critical paths required for complete solutions
• Address and resolve technical problems relating to the installation and upgrade of network hardware and systems.
• Interface with customers, vendors, and other technical staff to analyze business and technical requirements (i.e. establishing new circuits).
• Develop and document technical briefings, engineering standards, standard operating procedures, technical guidance, status reports and present to senior leadership
• Participate in the development of network architecture, engineering designs, and changes.
• Assist in evaluating current and emerging technologies - conduct technical assessments and make recommendations.
• Collaborate with key partners in various technologies to de-conflict efforts, identify innovation opportunities, gain efficiency while increasing operability
• Communicate with customer(s) on matters of significant importance to the organization
• Effectively complete individual projects and tasks.

Basic Qualifications:

• BS degree and 8 – 12 years of prior relevant experience or Masters with 6 – 10 years of prior relevant experience. May possess a Doctorate in technical domain.
• Candidate must possess an active DOD TS/SCI level security clearance, and be eligible to obtain and maintain a w/CI Poly
• IAT Level II Baseline Certification (e.g. CCNA Security, CySA+, GICSP, GSEC, Security+ CE, CND, SSCP)
• Ability to translate highly technical matter to non-technical audience
• Excellent communication skills
• Technical depth in network services and architecture (WAN/LAN/virtual private network (VPN))
• Experience developing solutions and troubleshooting the following vendors and technologies:
  • Cisco Switches and routers
  • S2S connections
  • DMVPNs
  • Advanced routing - BGP
  • Palo Alto Firewalls
  • AWS networked design and implementations.
  • Virtual Private Cloud (VPCs)
  • Route 53
  • Amazon Firewall Services
• Ability to make decision and escape when needed
• In-depth experience with security domains and industry best practices; business continuity and disaster recovery, emerging technology
• Self-starter with ability to work independently or in a team environment with little to no supervision
• Knowledge in Information Technology Infrastructure Library (ITIL) Foundation

Preferred Qualifications:

• Prior experienced with DISA and DISA’s support to mission partners
• Proficient in cloud hosted networks
• Master’s degree in IT, Cybersecurity, or related field

GSMO

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:

September 1, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $92,300.00 - $166,850.00

The Leidos pay range for this job level is a general guideline onlyand 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.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.