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# Network Engineer (Mid-Level) - TS/SCI with Polygraph Required

- **Company:** Catalyst
- **Location:** Vienna, VA, United States
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Multitier Architecture, Border Gateway Protocol, Networking Hardware, Virtual Private Networks (VPN), Multi-protocol Systems, Network Security, Network Layer, Routing, Open Shortest Path First (OSPF), Wide Area Networks, Computer Network Operations, Juniper, Information Technology, Low Latency, Cisco
- **Published:** November 7, 2026
- **Apply:** https://www.thejobnetwork.com/job/e25ce7e3-7d61-48d1-ae10-4b92803ac56d/network-engineer-midlevel-tssci-with-polygraph-required

## About the Role

US Citizenship and TS/SCI with Polygraph (no exceptions), * Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field and 3-7 years of relevant professional network engineering experience; equivalent combination of education and experience may be considered, * Proficiency configuring and troubleshooting enterprise network infrastructure (LAN/WAN/CAN)

 * Experience with routing and switching protocols (e.g., OSPF, BGP, MPLS, VRF, VPN)
 * Experience with network hardware from major vendors (e.g., Cisco, Juniper, Brocade)
 * Working understanding of network security principles and secure network design
 * DoD 8140/8570 Information Assurance Technical (IAT) Level II certification (or ability to obtain)
 * Strong troubleshooting skills across Layer 2 and Layer 3 network issues
 * Strong written and oral communication skills, with the ability to collaborate across cross-functional and CONUS/OCONUS teams

## Description

Mid-Level Network Engineers support the design, configuration, and troubleshooting of enterprise network infrastructure in support of the customer's requirements, working both individually and as members of a network operations team. Mid-Level Network Engineers implement routing and switching changes, perform Tier II/III troubleshooting of connectivity, latency, and routing issues, and support technical exchange meetings with other stakeholders. Mid-Level Network Engineers are expected to work with growing independence across CONUS and OCONUS network environments while continuing to build technical depth.