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MDA Network Engineer II

Job in O'Fallon, St. Clair County, Illinois, 62269, USA
Listing for: Leidos
Full Time position
Listed on 2026-09-05
Job specializations:
  • IT/Tech
    Network Engineer, Cybersecurity, Systems Engineer, IT Support
Job Description & How to Apply Below

Network Engineer

Our customer is the Defense Information Systems Agency (DISA) and acts as the provider of GIG/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 GIG capabilities and services in the 24x7 DISA Global Operations Center (DGOC).

The Leidos Digital Modernization Sector and Global Solutions Management-Operations II (GSMO-II) have an opening in our Missile Defense Agency (MDA) Operations Support Cell for a Network Engineer at Scott AFB, IL.

Responsibilities

Responsible for performing the following duties:

  • Execute network operations to include configuration and analysis of customer circuits across optical and electro-optical multiplexers, Time Division Multiplexing (TDM), routers, and switches.
  • Perform real-time circuit redesign (alternate routing) to restore customer connectivity during scheduled and unscheduled outages and maintenance actions.
  • Work directly with supported customers and engineers across other NOCs to ensure maximum network availability to minimize or eliminate mission and operational impact.
  • Proactively monitor network alarms across platform specific network management tools.
  • Utilize incident management applications to document all aspects of reported outages/degradations, isolations, escalations, and resolutions during the lifecycle of a service impacting network incident.
  • Assess, identify and recommend resolutions to various network incidents and/or deficiencies leveraging knowledge in one or more of following: routers, switches, crypto devices, Ciena, CISCO, Juniper, MSPP, DWDM, Optical Switching, SONET/SDH, satellite communications.
Basic Qualifications
  • Hold DoD-8570 IAT Level 2 baseline certification (Security+ CE or equivalent) prior to start date.
  • Requires BS degree and 2 – 4 years of prior relevant experience or Masters with less than 2 years of prior relevant experience. (Or equivalent combination of education and/or experience.)
  • Able to work in a 24x7 shift work environment.
  • Must have an active DoD Secret security clearance.
  • Requires working knowledge and understanding of both Transport and IP network topologies.
Preferred Qualifications
  • Tech control facility or cyber transport experience
  • Circuit actions experience
  • Telco NOC, inside or outside plant experience.
  • Experience with MS Office suite, i.e. Outlook, Excel, Word, Access, PowerPoint, TEAMs.
  • Experience with one or more of the following: alarm surveillance, fault management, LAN maintenance, performance management.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

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