Ready to put your networking expertise to work where it matters most? At Leidos, you’ll join a collaborative team of innovators supporting a mission-critical Intelligence Community customer, where every connection you build strengthens national security. The Maru Program is looking for a Senior Network Administrator who thrives in fast-paced Agile environments, enjoys solving complex technical challenges, and is passionate about delivering resilient, secure, and high-performing network solutions.
In this role, you'll work alongside talented engineers, architects, cybersecurity professionals, and software developers to modernize enterprise infrastructure, implement emerging technologies, and ensure mission systems remain secure, available, and ready for whatever comes next.
What You'll Do
As a Senior Network Administrator, you'll serve as a technical leader responsible for the administration, optimization, and security of enterprise network infrastructure supporting mission-critical operations.
Please note Gaithersburg, MD is the program’s primary work location.
Clearance Level Required:Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.
Primary Responsibilities:
- Design, configure, administer, and maintain complex enterprise LAN, WAN, WLAN, VPN, and data center network environments.
- Install, configure, and support Cisco routers, switches, firewalls, load balancers, and other network infrastructure components.
- Collaborate with Agile Scrum teams to deliver infrastructure enhancements supporting continuous integration and rapid capability delivery.
- Participate in sprint planning, backlog refinement, daily stand-ups, reviews, and retrospectives as the networking subject matter expert.
- Monitor network performance, capacity, and availability while proactively identifying opportunities for optimization.
- Troubleshoot complex network issues, perform root cause analysis, and implement long-term corrective actions.
- Implement and maintain secure network architectures in accordance with Intelligence Community security requirements and best practices.
- Support cloud connectivity, hybrid networking, and infrastructure modernization initiatives.
- Develop and maintain network documentation, topology diagrams, standard operating procedures, and configuration baselines.
- Coordinate hardware refreshes, software upgrades, maintenance windows, and patch management activities.
- Partner with cybersecurity teams to address vulnerabilities, implement security controls, and support audits and accreditation activities.
Required Qualifications:
- US citizenship is required per contract.
- Bachelor's degree in Computer Science, Engineering, Information Technology or related field and 8-12 years of prior relevant experience or Master’s with 6-10 years of prior relevant experience.
- 8+ years of network administration experience.
- DoD 8140/8570 Compliance: Must possess an active CompTIA Security+ (or higher baseline certification) to satisfy IAM Level I / IAT Level II requirements.
- Cisco Networking: Must possess an active Cisco Certified Network Associate (CCNA) or Cisco Certified Network Professional (CCNP) Enterprise certification.
- Experience supporting large-scale, mission-critical network environments.
- Strong expertise with Cisco routing and switching technologies.
- Thorough understanding of:
- TCP/IP
- OSPF, BGP, EIGRP
- VLANs
- DNS/DHCP
- VPN technologies
- NAT
- QoS
- Multicast
- Experience administering enterprise firewalls such as Cisco ASA, Palo Alto, or Fortinet.
- Experience with network monitoring and performance management tools.
- Strong troubleshooting, analytical, and problem-solving skills.
- Excellent communication skills and the ability to collaborate across technical disciplines.
- Experience working in Agile or Scrum environments.
Preferred Qualifications:
- ITIL Certification (ITIL v3 Foundation, ITIL 4 Foundation, or higher) or an equivalent IT service management framework certification (e.g., COBIT, ISO/IEC 20000).
- Experience supporting Intelligence Community or Department of Defense customers.
- Experience with AWS, Azure, or hybrid cloud networking.
- Knowledge of Software Defined Networking (SDN).
- Experience with network automation using Python, Ansible, or PowerShell.
- Familiarity with Zero Trust Architecture and micro-segmentation.
- Experience with DevSecOps and Infrastructure as Code (IaC).
- Experience with VMware NSX or Cisco ACI.
#Maru
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:August 7, 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
- US citizenship is required per contract.
- Active Top Secret/SCI clearance with ability to successfully pass a Polygraph examination.
- Bachelor's degree in Computer Science, Engineering, Information Technology or related field with 8-12 years relevant experience (or Master's with 6-10 years).
- 8+ years of network administration experience.
- DoD 8140/8570 compliance: active CompTIA Security+ (or higher) to satisfy IAM Level I / IAT Level II.
- Active Cisco Certified Network Associate (CCNA) or Cisco Certified Network Professional (CCNP) Enterprise certification.
- Experience supporting large-scale, mission-critical network environments.
- Strong expertise with Cisco routing and switching technologies.
- Thorough understanding of TCP/IP, OSPF, BGP, EIGRP, VLANs, DNS/DHCP, VPN technologies, NAT, QoS, and Multicast.
- Experience administering enterprise firewalls such as Cisco ASA, Palo Alto, or Fortinet.
- Experience with network monitoring and performance management tools.
- Strong troubleshooting, analytical, problem-solving, and communication skills; ability to collaborate across technical disciplines and work in Agile/Scrum environments.
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.
