Senior Network Engineer

R-00180463

Description

Leidos' Digital Modernization group is seeking a Senior Network Engineer in support of the Compartmented Enterprise Services Office (CESO). You will serve as the principal subject matter expert for network architecture, engineering, and operations in complex, multi-system environments. This role provides enterprise-level technical leadership for network integration and modernization efforts, drives adoption of advanced networking and cloud technologies, and influences technical direction across programs while mentoring other engineers.

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

• Serve as the principal SME for network architecture, engineering, and operations across complex, multi-tenant environments, providing enterprise-level technical leadership for network integration, consolidation, and modernization efforts to deliver secure, scalable, and resilient solutions aligned with customer and Leidos standards.
  
• Lead the design, implementation, and upgrade of advanced network architectures and engineering changes, including development and review of complex technical implementation plans (actions, milestones, timelines, and critical paths), while diagnosing and resolving the most complex issues related to network hardware, software, and systems in distributed environments.
  
• Engage directly with senior customer stakeholders, vendors, and cross-functional teams to shape, analyze, and validate business and technical requirements (e.g., new circuits and advanced network services), communicate risks and trade-offs, and influence technical and business decisions critical to mission outcomes.
  
• Drive the evaluation of current and emerging networking and cloud technologies, conduct technical assessments, and provide strategic recommendations that inform roadmaps, investment decisions, and continuous improvement of enterprise network and security posture.
  
• Partner with internal and external stakeholders to de-conflict engineering efforts, identify innovation opportunities, improve efficiency, and enhance interoperability and operability, while leading the creation and maintenance of technical briefings, engineering standards, SOPs, technical guidance, and status reports for senior leadership and governance forums.
  
• Provide technical mentorship and guidance to mid-level and junior engineers, setting expectations for engineering rigor, documentation quality, and operational excellence, and take end-to-end ownership of complex engineering projects and workstreams to ensure high-quality, on-time delivery aligned with contract, program, and mission priorities.
  
• Demonstrate deep hands-on expertise with Cisco switches and routers, Palo Alto firewalls, Site-to-Site (S2S) connections, Dynamic Multipoint VPNs (DMVPNs), advanced routing (BGP), and AWS network design and implementations including Virtual Private Clouds (VPCs), Route 53, and Amazon firewall services.
  
• Exercise sound technical judgment in high-impact situations, applying in-depth knowledge of security domains, industry best practices, business continuity, disaster recovery, and emerging networking and cloud security technologies, and operate as a self-starter with minimal direction, leveraging ITIL Foundation principles to inform operational processes
  

Basic Qualifications:

• Bachelor’s degree in a related technical field and typically 12–15+ years of prior relevant experience, or a Master’s degree with 10–13+ years of prior relevant experience (a Doctorate in a technical domain may substitute for some experience).
  
• Active DoD TS/SCI security clearance, with eligibility to obtain and maintain a CI polygraph.
  
• IAT Level II Baseline Certification (e.g., CCNA Security, CySA+, GICSP, GSEC, Security+ CE, CND, SSCP).
  
• Proven ability to explain highly technical topics to non-technical audiences, including senior leadership and mission stakeholders, and to influence technical and business decisions.
  
• Excellent verbal and written communication skills, including experience creating executive-ready technical briefings and documentation.
  
• Strong, hands-on technical depth in network services and architecture (WAN, LAN, VPN) across on-premises and cloud environments, with extensive experience designing, implementing, and troubleshooting solutions using Cisco switches and routers, Palo Alto firewalls, and AWS networking services (VPCs, Route 53, Amazon firewall services).
  

Preferred Qualifications:

• Prior experience supporting DISA and/or DISA mission partners and navigating DoD network, security, and accreditation processes.
  
• Proficiency designing and operating cloud-hosted and hybrid network environments and architectures at scale.
  
• Master’s degree in Information Technology, Cybersecurity, or a related technical field.
  
• Experience providing technical leadership on large programs, enterprise network modernizations, or major proposal efforts.
  

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: April 9, 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 $116,350.00 - $210,325.00

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.

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 .

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com .

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission .

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.