Network Engineer

Koitecc Solutions; Arlington, Northern (VA, KY); Hybrid; USD 92,000 - 167,000; Full time

Job summary

Leidos is seeking a Senior Network Engineer in Arlington, VA, to design, migrate, implement, and maintain infrastructure for the CESO program. This on-site role requires a TS/SCI clearance and CI poly eligibility, with experience across WAN/LAN, VPN, and secure network solutions.

You will collaborate with DISA and DHS partners to deliver integrated network architectures, configure Cisco/Palo Alto devices, and support cloud/network transitions in a DoD environment. U.S. citizenship is required.

Qualifications

• Active TS/SCI clearance required.
• IAT Level II Baseline Certification required (e.g. CCNA Security, CySA+, GICSP, GSEC).
• Demonstrated ability to translate technical concepts to non‑technical audiences.
• Strong communication and collaboration skills across teams.
• Experience with Cisco/HW networks, VPNs, WAN/LAN architectures, and security best practices.

Responsibilities

• Provide technical expertise for network integration across environments.
• Prepare and review implementation plans with milestones and critical paths.
• Resolve issues related to network hardware and software upgrades.
• Interface with customers, vendors, and technical staff to analyze requirements.
• Develop network designs and engineering standards; present to leadership.
• Collaborate on architecture changes and evaluate emerging technologies.
• Coordinate with partners to improve efficiency and operability.
• Communicate with customers on matters of significance.

Skills

Active TS/SCI clearance

IAT II Baseline

Strong communication

WAN/LAN/VPN expertise

Technical translation skills

Education

BS in a technical field

Master's degree in IT/Cybersecurity

Tools

Cisco switches/routers

Palo Alto firewalls

AWS VPC & Route 53

DMVPNs

BGP

Job 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:
  • o Cisco Switches and routers
  • - S2S connections
  • - DMVPNs
  • - Advanced routing - BGP
  • o Palo Alto Firewalls
  • o 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

Pay Range:

Pay Range $92,300.00 - $166,850.00

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 [e-mail].

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.