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Systems Engineer Jobs in Belleville, IL (NOW HIRING)

SAIC

Systems Engineer

Scott Air Force Base, IL · On-site

$40K - $80K/yr

Information Technology Subcategory: IT Systems Engineer Schedule: Full-Time Shift: Day Job Travel: No Minimum Clearance Required: Secret Clearance Level Must Be Able to Obtain: None Potential for ...

SAIC

Systems Engineer

Scott Air Force Base, IL

$40K - $80K/yr

Information Technology Subcategory: IT Systems Engineer Schedule: Full-Time Shift: Day Job Travel: No Minimum Clearance Required: Secret Clearance Level Must Be Able to Obtain: None Potential for ...

Amyx, Inc.

Systems Engineer

O Fallon, IL · On-site

Overview Amyx is seeking a Systems Engineer to join our Dept. of Defense client at Scott Air Force Base in O'fallon, IL. Responsibilities * This position will focus on being able to provide systems ...

Amyx, Inc.

Systems Engineer

O Fallon, IL · On-site

Amyx is seeking a Systems Engineer to join our Dept. of Defense client at Scott Air Force Base in O'fallon, IL. * This position will focus on being able to provide systems and technical engineering ...

Leidos

Systems Engineer SME

Madison, IL · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

Fenton, MO · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

Saint Louis, MO · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

Bridgeton, MO · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

East Carondelet, IL · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

Florissant, MO · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

Roxana, IL · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

Columbia, IL · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

Collinsville, IL · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

Caseyville, IL · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

South Roxana, IL · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

Venice, IL · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

Dupo, IL · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

Leidos

Systems Engineer SME

Maryville, IL · On-site

$131K - $237K/yr

As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ...

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All JobsSystems Engineer JobsSystems Engineer Jobs in Belleville, IL

Systems Engineer information

See Belleville, IL salary details

$52K

$123.6K

$162.2K

How much do systems engineer jobs pay per year?

As of Aug 11, 2026, the average yearly pay for systems engineer in Belleville, IL is $123,564.00, according to ZipRecruiter salary data. Most workers in this role earn between $95,200.00 and $152,500.00 per year, depending on experience, location, and employer.

What is a systems engineer?

Systems engineers are professionals who design, integrate, and manage complex systems throughout their life cycles. They work across various industries, ensuring that all aspects of a project or system—hardware, software, processes, and people—work together efficiently and effectively. Systems engineers coordinate between different engineering teams, address technical and organizational challenges, and ensure requirements are met. Their role often involves both big-picture thinking and attention to detail to deliver reliable and scalable solutions.

What does a systems engineer do?

The role of a systems engineer varies based on the company they work for, but in every industry systems engineers use computerized systems to keep track of all the moving parts within their organizations. The term systems engineer usually refers to a computer systems engineer, which combines several disciplines to create, purchase, and install a computer system that suits the needs of each particular client. They will also work in a hands-on manner during the installation, acquisition, testing, and implementation phases of the project. Duties typically include making recommendations for scalability, troubleshooting any problems that arise during the use of the system, reviewing a company’s security requirements, and recommending security measures to allow the company to avoid compromising any sensitive data.

What is the difference between Systems Engineer vs Network Engineer?

AspectSystems EngineerNetwork Engineer
CertificationsCompTIA Network+, Cisco CCNA, Microsoft certificationsCompTIA Network+, Cisco CCNA, Juniper JNCIA
Work EnvironmentDesigning, implementing, and managing IT systems and infrastructureDesigning, configuring, and maintaining network hardware and connectivity
Industry UsageIT, technology, enterprise solutionsTelecommunications, IT, networking service providers
Common TasksSystem integration, troubleshooting, server managementNetwork setup, routing, switching, security

While both roles involve technical expertise in IT infrastructure, Systems Engineers focus on overall system architecture and integration, whereas Network Engineers specialize in network hardware, connectivity, and security. Understanding these differences helps employers and professionals align skills with job requirements.

What are the key skills and qualifications needed to thrive as a systems engineer, and why are they important?

To thrive as a Systems Engineer, you need a strong background in systems architecture, troubleshooting, and integration, typically supported by a degree in computer science or engineering. Familiarity with operating systems (like Linux and Windows), virtualization platforms, scripting languages, and certifications such as CompTIA, Cisco (CCNA), or Microsoft (MCSA) are commonly required. Strong problem-solving abilities, effective communication, and teamwork make candidates stand out in this role. These skills and qualifications ensure the design, implementation, and maintenance of reliable, scalable systems critical for organizational operations.

How does a systems engineer typically collaborate with cross-functional teams during a project lifecycle?

Systems Engineers often serve as a bridge between various technical and non-technical teams, including software developers, network specialists, project managers, and end users. Throughout a project, they participate in requirements gathering, design reviews, and integration testing, ensuring that each component fits seamlessly within the overall system. Effective communication and documentation are crucial, as Systems Engineers must translate complex technical concepts into actionable tasks for diverse stakeholders. This collaborative approach not only streamlines problem-solving but also helps deliver robust, scalable solutions.
More about Systems Engineer jobs
What are the most commonly searched types of Systems Engineer jobs in Belleville, IL? The most popular types of Systems Engineer jobs in Belleville, IL are:
What are popular job titles related to Systems Engineer jobs in Belleville, IL? For Systems Engineer jobs in Belleville, IL, the most frequently searched job titles are:
What cities near Belleville, IL are hiring for Systems Engineer jobs? Cities near Belleville, IL with the most Systems Engineer job openings:
Systems Engineer jobs near you
Infographic showing various Systems Engineer job openings in Belleville, IL as of August 2026, with employment types broken down into 1% As Needed, 83% Full Time, 12% Part Time, 3% Contract, and 1% Nights. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution, with an average salary of $123,564 per year, or $59.4 per hour.

Systems Engineer

SAIC

Scott Air Force Base, IL • On-site

$40K - $80K/yr

Other

Posted 11 days ago

SAIC rating

7.9

Company rating: 7.9 out of 10

Based on 79 frontline employees who took The Breakroom Quiz

79th of 223 rated it services

Job description

Job ID: 2615080
Location: Scott Afb, IL, US
Date Posted: 2026-07-29
Category: Information Technology
Subcategory: IT Systems Engineer
Schedule: Full-Time
Shift: Day Job
Travel: No
Minimum Clearance Required: Secret
Clearance Level Must Be Able to Obtain: None
Potential for Remote Work: ORA_ON_SITE
Description
SAIC is seeking a System Engineer to support an IT Service Management effort for USTRANSCOM located at Scott Air Force Base (AFB) in Illinois. The USTC Managed Information Technology Services (MITS) contract is intended to provide strategic, technical, and program management guidance and support services to facilitate the operations and modernization of the combatant command's infrastructure, systems, and applications. This support will be provided to the USTC Command, Control, Communications & Cyber Systems Directorate (TCJ6).
The successful candidate will system engineering work to maintain, configure, and reliably operate network servers, server virtualization systems, laptops, desktops, VDI, and supporting software/hardware.
Responsibilities:
  • Managing and monitoring all installed systems and infrastructure
  • Installing, configuring, testing, and maintaining operating systems, application software and system management tools
  • Proactively ensure the highest levels of systems and infrastructure availability
  • Monitor and test application performance for potential bottlenecks, identify possible solutions, and work with developers to implement those fixes
  • Maintain security, backup, and redundancy strategies
  • Participate in the design of information and operational support systems
  • Provide 2nd and 3rd level support
  • Liaise with vendors and other IT personnel for problem resolution
  • System vulnerability remediation and reporting
  • System configuration and compliance
  • Proven working experience in installing, configuring, and troubleshooting UNIX/Linux/RedHat based environments

This position is for Monday through Friday, normal business hours. However, employee may be required to provide after-hours and weekend support during planned or emergency events.
Qualifications
Required Qualifications:
  • BA/BS and four (4) years or more experience
  • DoD Secret Clearance
  • One of these IAT Level II certifications: Security+ CE, CySA+ **, GICSP, GSEC, CND, SSCP
  • A Computing Environment (CE) certification or certificate for the technical area of responsibility in either Network support/defense (e.g., Splunk, Cisco, McAfee, etc.) OR (e.g., Microsoft, Linux, Solaris, etc.)
  • Must possess competencies in installation, service design, and support in an environment that uses Microsoft Windows Server 2012/2016
  • Experience with Azure or AWS Cloud Environments
  • Experience with Linux
  • Experience with production environments
  • Must be able to work independently and as part of a team
  • Must be available to participate in on-call work on a reoccurring basis
  • Solid troubleshooting skills and demonstrated ability of end-to-end problem management and ownership
  • Excellent written and oral communication skills
  • Working knowledge of authentication functions and protocols such as LDAP, Kerberos, and Active Directory
  • Conceptual knowledge of Storage systems (SAN/NAS)
  • Any of the following IT certifications are also desirable for this position: MCP, CompTIA A+ / Network+ / Security+, AWS, Azure

Desired Qualifications:
  • MA/MS
  • Six (6) or more years of experience
  • DoD TS/SCI clearance
  • ITIL V4 Foundations certification

Target salary range: $40,001 - $80,000. The estimate displayed represents the typical salary range for this position based on experience and other factors.
SAIC is a premier technology integrator providing full life cycle services and solutions in the technical, engineering, intelligence, and enterprise information technology markets. SAIC is Redefining Ingenuity through its deep customer and domain knowledge to enable the delivery of systems engineering and integration offerings for large, complex projects. SAIC's approximately 15,000 employees are driven by integrity and mission focus to serve customers in the U.S. federal government. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $4.5 billion. For more information, visit saic.com. For information on the benefits SAIC offers, see .

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