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Network Administrator

Job in Shiloh, St. Clair County, Illinois, USA
Listing for: Leidos
Full Time position
Listed on 2026-02-18
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer, Network Engineer, Network Security
Salary/Wage Range or Industry Benchmark: 60000 - 80000 USD Yearly USD 60000.00 80000.00 YEAR
Job Description & How to Apply Below

Network Administrator at Leidos summary:

Senior network engineer supporting DISA-managed DoD networks, responsible for installation oversight, configuration, testing, monitoring, and activation of network equipment (Cisco/Juniper) and out-of-band management networks. Duties include IP addressing and project documentation, software upgrades, network service configuration (BGP, OSPF, DHCP, DNS, VLANs, VPNs), customer coordination, IT&A, and data entry into DISA systems; requires active Secret clearance and DoD 8570 IAT Level 2 certification.

Position requires a BS (or MS) with relevant experience (4–8 years BS / 2–6 years MS) and is based at Scott AFB, IL under Leidos on a DISA contract.

Description

Our customer, the Defense Information Systems Agency (DISA), provides, operates, and assures command and control of the Defense Information System Network (DISN) services to its customers, the Department of Defense (DoD) and national security organizations. This position directly supports the DISA-provided capabilities and services.

The Leidos Digital Modernization Sector/Global Solutions Management-Operations II (GSMO-II) contract has an opening for an Implementations Network Engineer III in Scott AFB, IL. The Implementations Network Engineer will perform installation oversight, configuration, testing, monitoring, servicing of network equipment and activation of networks for projects supporting the Department of Defense networks.

This position requires U.S. citizenship and an active Secret clearance.

Primary Responsibilities

Responsible for performing and training team on the following duties:

  • Perform customer coordination, Initial Test and Acceptance (IT&A), execution of all reporting functions, and complete data input associated with new network equipment and service activations to ensure they are implemented in accordance with Defense Information Systems Agency (DISA) standards.
  • Configure and maintain DISA’s out-of-band management network consisting of Cisco and Juniper devices using baseline configurations customized for each site.
  • Upgrade software on Cisco and Juniper devices.
  • Create/update project planning documentation to support selecting and creating IP addressing schemes (subnet selection, equipment management IP selection) as well as assigning ports on out-of-band management nodes.
  • Perform systems analysis techniques and procedures, including consulting with users to determine hardware, software, or system functional requirements in support of customer resources.
  • Ensure all information (POC, location, & interface) is correct and formatted properly according to provided requirements.
  • Verify correct points of contact (POC) for each location through which the circuit traverses.
  • Engage with the DISA project managers and/or customers to resolve issues with incomplete or unclear requirements.
  • Reach out to stakeholders and facilitate approvals as necessary to ensure continual forward progress of the service request.
Basic Qualifications
  • Proficient knowledge of various network hardware equipment specifications, configuration and testing processes, and industry specifications.
  • Network engineering, problem management, and performance management experience.
  • Knowledge of networking architecture, evaluating, and recommending new technologies to enhance current capabilities and performing needs assessments.
  • Knowledge of data and voice network design carried over various transmission systems, router-to-router connections using military and commercial protocols such as BGP and ISIS, switch-to-switch trunking to include VLANs, and circuit configurations through multiplexers.
  • Experience with network services (BGP, OSPF, DHCP, DNS, TCP/IP, WAN, VPN, VLAN, VRF, etc.) and network appliances (e.g., routers, load balancers, domain name servers, firewalls).
  • Knowledge of configuring, activating, testing, and analyzing network systems.
  • Ability to work in a team environment, but self-driven to complete assignments while continually developing proficiencies in processes.
  • Strong written and verbal communications, team building and collaboration skills.
  • An active Secret security clearance is required.
  • DoD-8570 IAT Level 2 baseline…
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