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Unix Linux Systems Engineer Jobs in Illinois (NOW HIRING)

SAIC

Systems Engineer

Scott Air Force Base, IL · On-site

$40K - $80K/yr

Proven working experience in installing, configuring, and troubleshooting UNIX/Linux/RedHat based ... delivery of systems engineering and integration offerings for large, complex projects. SAIC ...

Aquatic Capital Management

Systems Engineer

Chicago, IL · On-site

$150K - $300K/yr

Systems Engineer Infrastructure & Research Computing Aquatic Capital Management Chicago, IL ... Deep Unix/Linux expertise across multiple distributions; comfortable at every layer of the stack.

Aquatic Capital Management

Systems Engineer

Chicago, IL · On-site

$150K - $300K/yr

Systems Engineer Infrastructure & Research Computing Aquatic Capital Management • Chicago, IL • ... Deep Unix/Linux expertise across multiple distributions; comfortable at every layer of the stack.

Aquatic Capital Management

Systems Engineer

Chicago, IL

$150K - $300K/yr

Systems Engineer Infrastructure & Research Computing Aquatic Capital Management • Chicago, IL • ... Deep Unix/Linux expertise across multiple distributions; comfortable at every layer of the stack.

SAIC

IL · On-site

$40K - $80K/yr

Description SAIC is seeking a System Engineer to support an IT Service Management effort for ... Proven working experience in installing, configuring, and troubleshooting UNIX/Linux/RedHat based ...

Aplaro Ltd

Junior Trading Systems Engineer

Chicago, IL · On-site

Hudson River Trading (HRT) is seeking a Junior Trading Systems Engineer to join our growing Trading ... Manage worldwide Linux-based trading infrastructure by contributing to the planning and execution ...

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Unix Linux Systems Engineer information

What is a Unix Linux systems engineer?

Unix Linux Systems Engineers are IT professionals responsible for designing, implementing, maintaining, and troubleshooting Unix and Linux-based operating systems within an organization. They ensure server reliability, security, and performance, often managing system upgrades, patching, and user permissions. Their expertise is crucial for supporting enterprise applications, automating tasks through scripting, and maintaining system backups and disaster recovery processes. These engineers frequently work with other IT teams to ensure seamless integration between hardware, software, and network resources.

What are the key skills and qualifications needed to thrive as a Unix Linux systems engineer?

To thrive as a Unix/Linux Systems Engineer, you need deep expertise in Unix/Linux operating systems, shell scripting, and system administration, often supported by a degree in computer science or related certifications such as CompTIA Linux+ or Red Hat Certified Engineer (RHCE). Familiarity with configuration management tools (like Ansible or Puppet), virtualization platforms, and monitoring systems is commonly required. Strong problem-solving abilities, attention to detail, and effective communication are standout soft skills in this role. These skills ensure the reliability, security, and optimal performance of critical IT infrastructure in diverse business environments.

What are some common challenges faced by Unix Linux systems engineers in managing large-scale server environments?

Unix Linux Systems Engineers often encounter challenges such as ensuring system uptime, managing configuration consistency across numerous servers, and applying security patches without disrupting critical services. Automating repetitive tasks and monitoring system performance are essential skills to efficiently handle scale and prevent issues before they impact users. Collaborating closely with network, security, and application teams is crucial for seamless operations and resolving complex incidents quickly.

What is the difference between Unix Linux Systems Engineer vs Network Administrator?

AspectUnix Linux Systems EngineerNetwork Administrator
Primary FocusDesign, implement, and maintain Unix/Linux systems and infrastructureManage and support network hardware, configurations, and connectivity
CertificationsLinux+, RHCE, CompTIA Server+CCNA, Network+
Work EnvironmentData centers, server rooms, cloud environmentsOffice networks, data centers, enterprise environments
Common TasksServer setup, scripting, system optimizationNetwork setup, troubleshooting, security

The Unix Linux Systems Engineer primarily focuses on managing and optimizing Unix/Linux servers and systems, while the Network Administrator handles network infrastructure and connectivity. Both roles require certifications and work in similar environments, but their core responsibilities differ significantly.

What cities in Illinois are hiring for Unix Linux Systems Engineer jobs?

Cities in Illinois with the most Unix Linux Systems Engineer job openings:

Infographic showing various Unix Linux Systems Engineer job openings in Illinois as of August 2026, with employment types broken down into 76% Full Time, and 24% Contract. Highlights an 89% In-person, and 11% Remote job distribution.

Systems Engineer

Scott Air Force Base, IL • On-site

SAIC
IT Services • 10K+ employees
Learn more about SAICexternal

$40K - $80K/yr

Other

Re-posted 10 days ago

SAIC rating

7.6

Company rating: 7.6 out of 10

Based on 81 frontline employees who took The Breakroom Quiz

103rd of 226 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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