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Network Engineer

Job

Marathon TS

Belleville, IL (In Person)

Full-Time

Posted 1 week ago (Updated 3 days ago) • Actively hiring

Expires 7/2/2026

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Job Description

Network Engineer at Marathon TS Network Engineer at Marathon TS in Belleville, Illinois Posted in 2 days ago.
Type:
full-time
Job Description:
Network Engineer Onsite at Scott AFB, IL Sponsorship for a SECRET clearance Marathon TS is seeking a Network Engineer to support mission-critical DoD communications and enterprise network environments. This role is responsible for monitoring network health, troubleshooting outages and performance issues, supporting change management, coordinating circuit and service activation activities, and working with customers, vendors, and internal engineering teams to maintain reliable network operations. This position is a strong fit for candidates with backgrounds in NOC operations, routing and switching, telecom/circuit support, DISA environments, JRSS, MPLS, LAN/WAN, or network engineering. Candidates do not need to currently hold a clearance; Marathon TS is able to sponsor qualified candidates for a security clearance. Required Qualifications U.S. citizenship. Ability to obtain and maintain a U.S. government security clearance; Marathon TS is able to sponsor qualified candidates. Security+ CE or equivalent DoD 8570 IAT Level II certification. Experience supporting network operations, NOC environments, telecommunications, enterprise networks, DoD networks, or network engineering. Working knowledge of routers, switches, routing protocols, network topologies, and IP-based communications. Experience with any of the following:
LAN/WAN MPLS VPN
VLANs
TCP/IP DNS/DHCP
OSPF, BGP, ISIS, or similar routing protocols Cisco or Juniper environments Firewalls, proxies, IDS/IPS, or load balancers Network monitoring or alarm surveillance tools Ability to document technical issues clearly and communicate with customers, engineers, vendors, and internal teams.