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Senior Network and Computer Systems Administrator

Marathon TS

Portsmouth, VA

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JOB DETAILS
SKILLS
BGP, Business Continuity Planning (BCP), Capacity and Performance Management, Change Management, Computer Firmware, Computer Networks, Computer Science, Configuration Management, Disaster Recovery, Firewalls, Identify Issues, Information Technology & Information Systems, Intrusion Detection Systems, Intrusion Prevention Systems, Network Administration/Management, Network Architecture/Engineering, Network Configuration Management, Network Monitoring, Network Routers, Network Security, Network Switching, Open Shortest Path First Protocol (OSPF), QoS (Quality of Service), Routing Protocols, Software Patches, Systems Administration/Management, TCP/IP (Transmission Control Protocol/Internet Protocol), VLAN (Virtual Local Area Network), VPN (Virtual Private Network)
LOCATION
Portsmouth, VA
POSTED
2 days ago
Senior Network and Computer Systems Administrator
Portsmouth, VA
Job Summary
We are seeking a Senior Network and Computer Systems Administrator is responsible for the design, implementation, and maintenance of enterprise network and server infrastructure to ensure secure, reliable, and high-performance IT operations. This role combines advanced networking expertise with comprehensive systems administration skills to support mission-critical environments.

Responsibilities
  • Configure, monitor, and troubleshoot routers, switches, firewalls, and VPNs.
  • Manage network performance, capacity planning, and QoS policies.
  • Implement and maintain network security measures (ACLs, IDS/IPS, STIG compliance).
  • Perform firmware upgrades, patching, and vulnerability remediation.
  • Support disaster recovery and business continuity planning.
  • Document network architecture, configurations, and change management processes.
Education and Experience
  • Bachelor's degree in IT, Computer Science, or related field.
  • 10+ years of experience in enterprise networking.
Required Skills
  • Strong knowledge of TCP/IP, VLANs, routing protocols (OSPF, BGP), and network monitoring tools.
Security Clearance
  • U.S Citizen
  • Active Top Secret (T5)


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Marathon TS is committed to the development of a creative, diverse and inclusive work environment. In order to provide equal employment and advancement opportunities to all individuals, employment decisions at Marathon TS will be based on merit, qualifications, and abilities. Marathon TS does not discriminate against any person because of race, color, creed, religion, sex, national origin, disability, age or any other characteristic protected by law (referred to as "protected status ").

About the Company

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Marathon TS

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