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# Network Infrastructure Systems Administrator - TSSCI w/ Poly

- **Company:** Insight Global
- **Location:** Bethesda, MD, United States
- **Contract:** Permanent contract
- **Skills:** Amazon Web Services, Microsoft Azure, Border Gateway Protocol, Unix, Cisco Routers, Cloud Computing, CompTIA Network+, Data Transmissions, Linux, Networking Hardware, IPv4, Virtual Private Networks (VPN), Python (Programming Language), Network Troubleshooting, Microsoft Software, Network Architecture, Network Control, Network Planning and Design, Routing, Network Administration, Open Shortest Path First (OSPF), Ansible, TCP/IP, Computer Networking Systems, Google Cloud, Computer Network Operations, Computer Network Technologies, Firewalls (Computer Science), Juniper, Information Technology, SolarWinds (Software), Cisco, User Accounts, Vmware
- **Published:** October 3, 2026
- **Apply:** https://dejobs.org/x/x/DAE505B8B43046CCAE9F67C2952C0873/job/

## About the Role

* Active TS/SCI with Polygraph * Bachelor's degree in Computer Science, Engineering or similar field or similar experience * Experience designing and building enterprise-level network architectures * Experience supporting and troubleshooting production network systems built with Cisco and/or Juniper network vendor platforms * Knowledge of and experience with networking technology and protocols, TCP/IP, Routing (static, OSPF, BGP, and policy-based), Firewalls (zone based polices and ACLs), SSH, VPNs * Knowledge of network management platforms such as Solarwinds * Demonstrated understanding of IPv4 networks * Experience with network device hardening in accordance with industry best practices * Knowledge of different operating systems (Microsoft, Unix, Linux, etc.) * Attention to detail, problem solving mindset, critical thinking and teamworking skills * Cisco CCNP or Juniper JCNIP certifications or skill level at minimum (Senior / Expert) * Experience with automating network
tasks using Ansible or Python * Familiarity with cloud hosting solutions such as Amazon AWS, Microsoft Azure and Google Cloud * VMWare experience * CompTIA Network+, CCNP, CCNA certifications

## Description

Insight Global is seeking a Network System Administrator to support an intelligence customer! You will support the customer's data communications network; maintain the network hardware and software as well as monitor the network to ensure availability to all system users; and perform the necessary maintenance to support network availability. You will need to be proficient in Cisco network solutions, as well as software defined networks and firewalls from AWS, Google, and Microsoft. * Deploy, configure, maintain and monitor all active network equipment (Cisco routers, switches, firewalls) ensuring seamless network operations * Responsible for troubleshooting and resolving network issues, implementing security measures and proactively optimizing network performance * Monitor and resolve network related service tickets * Maintain Standard Operating Procedures (SOPs) and network design documentation * Setup user accounts, permissions and passwords * Perform network upgrades to maintain
system integrity and overall availability * Support and administer third-party applications * Ensure security and efficiency of IT infrastructure following industry standards