Top 282 System engineer Jobs in Belleville, Il

Network Engineer III
Leidos —Scott AFB, IL
- $73,450 - $132,775 a year
- Full-time
- Microsoft Outlook
- Mid-level
- Bachelor's degree
Implementations Network Engineer II
Leidos —Scott AFB, IL
- $59,150 - $106,925 a year
- Full-time
- Bachelor of Science
- Mid-level
- Master's degree
Network Engineer II
Leidos —Scott AFB, IL
- $59,150 - $106,925 a year
- Full-time
- Microsoft Outlook
- Mid-level
- Bachelor's degree
Network Engineer II
Leidos —Scott AFB, IL
- $59,150 - $106,925 a year
- Full-time
- Microsoft Outlook
- Mid-level
- Bachelor's degree
1d
Implementations Network Engineer II
Leidos —Scott AFB, IL
- $59,150 - $106,925 a year
- Full-time
- Bachelor of Science
- Mid-level
- Master's degree
Network Engineer III
FEDITC LLC —Scott AFB, IL
- $125,000 - $150,000 a year
- Full-time
- 7 years
- Bachelor of Science
- System design
- Disability insurance
- Health insurance
Quick Apply
Sr. Mechanical Engineer - HVAC/Building Systems
Farnsworth Group —St. Louis, MO
- Online Application
- Writing skills
- Research
- Mentoring
- Health savings account
- Disability insurance
Quick Apply
Mobile Device Systems Administrator Senior
General Dynamics Information Technology —St. Louis, MO
- $129,813 - $138,000 a year
- System design
- Bachelor's degree
- Experience equivalent to degree accepted
- Paid time off
- 401(k) matching
Implementations Network Engineer III
Leidos —Scott AFB, IL
- $73,450 - $132,775 a year
- Full-time
- Bachelor of Science
- Master's degree
- Bachelor's degree
Engineer Technical Specialist 2
The Structures Company, LLC —Berkeley, MO
- $49.75 an hour
- Contract
- Computer Science
- Bachelor of Science
- Engineering
- Health insurance
- Dental insurance
Quick Apply
Implementations Network Engineer II
Leidos —Scott AFB, IL
- $59,150 - $106,925 a year
- Full-time
- Bachelor of Science
- Mid-level
- Master's degree
Implementations Network Engineer IV
Leidos —Scott AFB, IL
- $92,300 - $166,850 a year
- Full-time
- 6 years
- Doctoral degree
- Bachelor of Science
Mid-Level Test Engineer
Leidos —St. Louis, MO
- $87,100 - $157,450 a year
- Full-time
- Azure
- Computer Science
- Mid-level
2d
Full Stack Software Engineer (AWS) TS-SCI CI Poly
InSequence Inc. —St. Louis, MO
- $170,000 - $190,000 a year
- Full-time
- Computer science
- Computer Science
- System design
- Profit sharing
- Health savings account
Quick Apply
User Engagement Engineer SME
Leidos —St. Louis, MO
- $116,350 - $210,325 a year
- Full-time
- Engineering
- Office
- Master's degree
2d
Cyber Security Engineer - NSS Tools
CACI —St. Louis, MO
- $75,200 - $158,100 a year
- Full-time
- 7 years
- Computer Science
- Mid-level
- Health insurance
Enterprise Voice Engineer III
Leidos —Scott AFB, IL
- $73,450 - $132,775 a year
- Full-time
- Bachelor of Science
- Master's degree
- Analysis skills
Research & Development Engineer
Basler Electric Company —Highland, IL
- $131,000 - $150,500 a year
- Full-time
- Background check
- Computer literacy
- Writing skills
- Paid jury duty
- AD&D insurance
Quick Apply
Enterprise Voice Engineer II
Leidos —Scott AFB, IL
- $59,150 - $106,925 a year
- Full-time
- Bachelor of Science
- Mid-level
- Master's degree
7d
Network Software Engineer Lead
Leidos —Scott AFB, IL
- $107,900 - $195,050 a year
- Full-time
- 6 years
- Doctoral degree
- Bachelor of Science
19h

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system engineer jobs near belleville, il

Network Engineer III

Leidos -
Scott AFB, IL

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Job Details

Full-time
$73,450 - $132,775 a year

Qualifications

DoD 8570
IAT
IAT Level II

Full Job Description

Description

The Digital Sector of Leidos has multiple openings in our Joint Fires Network (JFN) NOC for a Network Engineer III 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 4+ 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.
Possess deep understanding of both Transport and IP network topologies.
Must have an active DoD Top Secret security clearance with Sensitive Compartmented Information (SCI) eligibility.

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.

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:

June 18, 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 $73,450.00 - $132,775.00

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.

About 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 $16.7 billion for the fiscal year ended January 3, 2025. 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 at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [email protected].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

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.

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Refine Your Search

system engineer jobs in belleville, il

Network Engineer III

Implementations Network Engineer II

Network Engineer II

Network Engineer II

Implementations Network Engineer II

Network Engineer III

Sr. Mechanical Engineer - HVAC/Building Systems

Mobile Device Systems Administrator Senior

Implementations Network Engineer III

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Implementations Network Engineer II

Implementations Network Engineer IV

Mid-Level Test Engineer

Full Stack Software Engineer (AWS) TS-SCI CI Poly

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Research & Development Engineer

Enterprise Voice Engineer II

Network Software Engineer Lead

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