Sr. Network Administrator

Description Readyto put yournetworking expertise towork where itmatters most? At Leidos, you'll joina collaborative teamof innovators supportinga mission-criticalIntelligence Communitycustomer, where everyconnection you buildstrengthens national security. The Maru Program is looking foraSenior Network Administratorwho thrivesin fast-pacedAgile environments, enjoyssolving complex technicalchallenges, and ispassionate about deliveringresilient, secure, and high-performing network solutions. In this role, you'll work alongsidetalented engineers, architects, cybersecurity professionals, and software developersto modernize enterpriseinfrastructure,implement emerging technologies, and ensure missionsystemsremain secure, available, and ready forwhatever comes next. What You'll Do As a SeniorNetwork Administrator,you'll serve asa technical leaderresponsible for theadministration, optimization, and security ofenterprise network infrastructuresupporting mission-criticaloperations. 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 complexenterpriseLAN, WAN, WLAN, VPN, and datacenter network environments. Install, configure, andsupport Cisco routers, switches, firewalls, loadbalancers, and othernetwork infrastructurecomponents. Collaboratewith Agile Scrumteams to deliverinfrastructure enhancementssupporting continuous integrationand rapid capabilitydelivery. Participate in sprintplanning, backlog refinement, daily stand-ups, reviews, and retrospectives asthe networking subjectmatter expert. Monitor network performance, capacity, and availability whileproactively identifyingopportunities for optimization. Troubleshoot complex networkissues, perform rootcause analysis, andimplementlong-term correctiveactions. Implement and maintainsecure network architecturesin accordance withIntelligence Communitysecurity requirements andbest practices. Support cloud connectivity, hybrid networking, and infrastructure modernizationinitiatives. Develop and maintainnetwork documentation,topology diagrams, standardoperating procedures, andconfiguration baselines. Coordinate hardware refreshes, software upgrades, maintenancewindows,and patch managementactivities. Partner with cybersecurityteams to addressvulnerabilities, implementsecurity controls, andsupportaudits and accreditationactivities. 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 ofnetwork administrationexperience. 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. Experiencesupporting large-scale, mission-critical networkenvironments. Strong expertisewith Cisco routingand switching technologies. Thorough understanding of:

TCP/IP

OSPF, BGP, EIGRP

VLANs

DNS/DHCP

VPN technologies NAT QoS Multicast Experience administeringenterprise firewalls suchas Cisco ASA, Palo Alto, orFortinet. Experiencewith network monitoringand performance managementtools. Strong troubleshooting,analytical, and problem-solving skills. Excellent communicationskills and theability to collaborateacross technicaldisciplines. Experience working inAgile or Scrumenvironments. PreferredQualifications: 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 IntelligenceCommunity or Departmentof Defense customers. Experience with AWS, Azure, or hybridcloud networking. Knowledge of SoftwareDefined Networking (SDN). Experience with networkautomation using Python,Ansible, or PowerShell. Familiarity with ZeroTrust Architecture andmicro-segmentation. Experience with DevSecOpsand Infrastructure asCode (IaC). Experience with VMwareNSX or CiscoACI. #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, 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 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. competitive compensation Health and Wellness programs Income Protection Paid Leave Retirement More details are available at 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. #J-18808-Ljbffr Leidos Inc