Leidos is seeking a Senior Network Engineer to join our Defense Enclave Services (DES) team at Ft. Meade, MD. The DES program is a highly demanding mission and requires expert technical and professional management to support DISA's enterprise Information Technology (IT) services. You will be supporting a large and complex IT discovery, design, and migration effort aimed at consolidating Department of Defense (DOD) IT services into single service provider model. This role will include discovery, analysis, design, and network migration activities necessary to move a host of DoD agencies into the modernized DoDNet environment.
Primary Responsibilities:
Plan and design secure network solutions to consolidate connectivity services under an enterprise service.
Partner with key stakeholders and technical experts to perform legacy environment discovery, assessing current capabilities, configurations, and unique requirements to develop a design and architecture leveraging approved design patterns.
Design secure wide area connectivity inclusive of underlay, overlay, and COI transport design that supports performance, quality of service, security, and mission requirements.
Provide secure access solutions leveraging wired and wireless technologies, integrating standards, use cases/scenarios, and develop associated implementation and transition plans.
Integrate capacity planning and scaling of network and security stack environments into the overall design of solutions.
Collect, investigate, and identify network optimization strategies and techniques to meet capacity and performance standards.
Identify legacy service paths (i.e. dataflow, firewall rulesets, and ACLs) and develop strategies and designs for the to-be enterprise service capability to meet requirements while balancing security, sustainability, and maintainability.
Support development of IP addressing schemes across IPv4 and IPv6 networks.
Work with information assurance teams to ensure compliance to DoD standards to assist with providing accreditation artifacts.
CLEARANCE REQUIREMENT: Must hold an active Secret security clearance prior to start and be able to obtain a Top Secret. (US Citizenship required)
Basic Qualifications:
Bachelor’s degree and 4+ years of prior relevant experience. Specific experience, education and training may be considered in lieu of degree.
Active DoD Secret clearance
Require network certification which shall meet or exceed a CCNA (comparable vender certification accepted upon review).
Require active DoD IAT Level II (i.e. Security+) certification or equivalent prior to start.
Experience documenting logical or physical designs using drawing tools (e.g. Visio, Powerpoint, Gliffy, Cameo, MagicDraw) to depict systems, subsystems, interfaces, components, and communications of I/T applications and infrastructure
Experienced and comfortable with conducting technical troubleshooting to resolve issues.
Experience conducting site surveys or analyzing data obtained from site surveys.
Experience creating or executing a migration plan to move circuits, network traffic, services, applications, or data between environments or to a commercial cloud provider. Alternatively, experience planning or executing a technology refresh or lifecycle refresh of an existing I/T system.
Heavily experienced in upgrading and LCR of network devices.
Must have broad exposure to common I/T infrastructure networking in the areas of LAN, WAN, TCP/UDP, IPSec, VPN, Proxies, Routing(L2/L3), and Firewalls.
Must have experience in working with two or more of the following vender network technologies: Cisco, Juniper, F5, Aruba, Palo Alto, Dell, Brocade, and Fortinet.
Demonstrated experience in designing and implementing medium to large network infrastructure and producing corresponding technical documentation.
Must be able to work as part of a team to troubleshoot and resolve complex network issues.
Excellent written and verbal communication skills. This shall include drafting SOPs and technical documentation.
Requires ability to communicate with executive leadership (internally or client) regarding matters of significant important to the organization/project.
Must be able to present designs and plans to technical leadership personnel and boards for approvals.
Preferred Qualifications:
Certified Cisco Network Professional (CCNP) or equivalent.
Demonstrated experience in one or more of the following enterprise network management tools such as PaloAlto Panorama, SolarWinds, Cisco Prime, Cisco DNA, What’s Up Gold, or Junos Space.
Experience in designing and implementing VTC solutions.
Experience with ScienceLogic SL1 and/or SolarWinds.
Hands on experience with SD-WAN.
Demonstrate expertise in design and improvement of complex and geographically enterprise networks.
Expert knowledge of DoD security requirements for network infrastructure.
Demonstrate experience in system hardening of network infrastructure to include DoD STIG implementation.
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 10, 2026For 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.
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.
Skills Required
- Bachelor’s degree and 4+ years of relevant experience; equivalent education, training, or experience may be considered
- Active DoD Secret security clearance
- Network certification meeting or exceeding CCNA, or comparable vendor certification
- Active DoD IAT Level II certification, such as Security+, or equivalent
- Experience documenting logical or physical designs using tools such as Visio, PowerPoint, Gliffy, Cameo, or MagicDraw
- Technical troubleshooting experience
- Experience conducting or analyzing site surveys
- Experience creating or executing migration plans for circuits, traffic, services, applications, or data, or planning and executing technology refreshes
- Extensive experience upgrading and performing LCR of network devices
- Broad networking experience with LAN, WAN, TCP/UDP, IPSec, VPN, proxies, Layer 2/Layer 3 routing, and firewalls
- Experience with at least two vendor technologies among Cisco, Juniper, F5, Aruba, Palo Alto, Dell, Brocade, and Fortinet
- Experience designing and implementing medium-to-large network infrastructure and producing technical documentation
- Ability to troubleshoot and resolve complex network issues as part of a team
- Excellent written and verbal communication skills, including drafting SOPs and technical documentation
- Ability to communicate with executive leadership and present designs to technical leadership and approval boards
- CCNP or equivalent certification
- Experience with enterprise network management tools such as Palo Alto Panorama, SolarWinds, Cisco Prime, Cisco DNA, WhatsUp Gold, or Junos Space
- Experience designing and implementing VTC solutions
- Experience with ScienceLogic SL1 and/or SolarWinds
- Hands-on experience with SD-WAN
- Expertise designing and improving complex geographically distributed enterprise networks
- Expert knowledge of DoD network infrastructure security requirements
- Experience hardening network infrastructure, including DoD STIG implementation
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
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Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
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Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
What We Do
We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.
