Network Engineer II

Leidos LLC; Illinois; On-site; USD 59,000 - 107,000; Full time

Job summary

Leidos LLC is seeking a Network Engineer II to support the 24x7 DISA Global Operations Center at Scott AFB, IL. You will execute network operations, assist with incident and change management, and coordinate with multiple teams to ensure maximum network availability for DoD missions.

Qualified candidates have a Bachelor's degree (or equivalent), DoD-8570 IAT Level 2 (Security+ CE), and an active DoD TS clearance. Experience with Cisco/Juniper and network monitoring tools is preferred.

Qualifications

• Bachelor's degree or equivalent combination of education/experience.
• DoD-8570 IAT Level 2 baseline certification (Security+ CE or equivalent).
• Able to work in a 24x7 shift environment.
• Active DoD Top Secret clearance.
• Strong knowledge of Transport and IP network topologies.

Responsibilities

• Execute network operations including configuration and analysis of customer circuits across optical/electro-optical multiplexers, routers, and switches.
• Perform real-time circuit redesign to restore connectivity during outages.
• Collaborate with customers, government agencies, and engineering tiers to maximize network availability.
• Monitor network alarms with platform management tools.
• Perform change management tasks including hardware replacement and software configurations.
• Document outages and resolutions using incident management applications.
• Identify and recommend resolutions leveraging knowledge of routers, switches, crypto devices, CISCO, Juniper, MSPP, OTN, MPLS, SDH/SONET.

Skills

Network operations

Security+ CE

DoD Top Secret clearance

24x7 shift experience

IP/Transport topology

Cisco

Juniper

MSPP

SLA/Incident management

Education

Bachelor's degree

Tools

SolarWinds

JIRA

Job description

The Digital Sector of Leidos has multiple openings in our Joint Fires Network (JFN) NOC for Network Engineer II supporting our Global Solutions Management-Operations II (GSMO-II) program at Scott AFB, IL.

POSITION SUMMARY:

Our customer, Defense Information Systems Agency (DISA), 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).

PRIMARY RESPONSIBILITIES:

• Execute network operations to include configuration and analysis of customer circuits across optical and electro-optical multiplexers, 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 internal and external customers, external government agencies, and other engineering tiers to ensure maximum network availability to minimize or eliminate mission and operational impact.
• Proactively monitor network alarms across platform specific network management tools.
• Perform a variety of change management tasks which include hardware replacement, software configurations, and ASI management.
• 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, routing, CISCO, Juniper, MSPP, optical transport network, MPLS, time division multiplexing, SDH/SONET.

BASIC QUALIFICATIONS:

• Bachelor's degree and 2+ years of prior relevant experience; or equivalent combination of education and/or experience.
• Hold DoD-8570 IAT Level 2 baseline certification (Security+ CE or equivalent) prior to start date.
• Able to work in a 24x7 shift work environment.
• Working knowledge of both Transport and IP network topologies.
• Must have an active DoD Top Secret security clearance.

PREFERRED QUALIFICATIONS:

• Tech control facility or cyber transport experience.
• Circuit actions and vendor experience.
• IP/Transport architecture experience.
• Solarwinds and JIRA 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, change management.

JFN 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.

Original Posting: August 31, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $59,150.00 - $106,925.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers.

Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

• competitive compensation
• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law.

Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.