Senior DoD Network Engineer — 24x7 Ops (TS)

Cornerstone Defense LLC; Belleville (IL); On-site; USD 100,000 - 120,000; Full time

Benefits offered by this job

Medical, Dental and Vision Plans

Generous PTO Policy

401(k)

HSA and FSA options

Life and Disability Insurance

Tuition Reimbursement and Training

Perks at Work Discount Program

Referral Program

Leads Generation Program

CollegeAmerica 529

Fitness Reimbursement Program

Travel Assistance

Norton Lifelock Benefit Solutions

Life Planning Financial & Legal

Job summary

Cornerstone Defense LLC is seeking a Network Engineer III for Joint Fires Network (JFN) at Scott AFB, IL. The role leads senior-level troubleshooting, complex circuit redesign, and operational support in a 24x7 environment serving high-visibility DoD customers.

The candidate will handle configuration, optimization, and real-time routing changes, engage with customers, and document incidents end-to-end. DoD Top Secret clearance is required, with DoD-8570 IAT II certification prior to start.

Qualifications

• Bachelor’s degree with 4+ years relevant network experience.
• DoD-8570 IAT Level II certification (Security+ CE or equivalent) prior to start.
• Ability to work in a 24x7 shift environment.
• Deep understanding of IP and transport network topologies.

Responsibilities

• Execute network operations involving configuration, analysis, and optimization of customer circuits across optical multiplexers, electro-optical systems, routers, and switches.
• Perform real-time circuit redesign and routing adjustments to restore connectivity during outages, maintenance events, or unexpected network degradations.
• Engage directly with internal customers, external agencies, service providers, and higher-tier engineering teams to maintain maximum network availability.
• Proactively monitor alarms using platform-specific network management tools to rapidly detect service-impacting conditions.
• Perform change-management tasks including hardware replacements, platform configurations, and ASI updates.
• Use incident management applications to thoroughly document outages, escalation paths, troubleshooting actions, root cause isolation, and resolutions.
• Assess, diagnose, and recommend corrective actions for advanced network issues using deep expertise across routers, switches, crypto devices, Cisco, Juniper, MSPP, optical transport, MPLS, TDM, and SDH/SONET networks.

Skills

DoD IAT II

24x7 shift

IP/Transport topologies

Education

Bachelor’s degree

Tools

SolarWinds

Jira

Job description

Cornerstone Defense LLC is seeking a Network Engineer III for Joint Fires Network (JFN) at Scott AFB, IL. The role leads senior-level troubleshooting, complex circuit redesign, and operational support in a 24x7 environment serving high-visibility DoD customers.

The candidate will handle configuration, optimization, and real-time routing changes, engage with customers, and document incidents end-to-end. DoD Top Secret clearance is required, with DoD-8570 IAT II certification prior to start.