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Unix Linux System Engineer Jobs in Illinois (NOW HIRING)

IMC

Linux Engineer

Chicago, IL · On-site

We're seeking a Linux Engineer with deep systems expertise and Python/scripting experience to join our growing global team. You will be responsible for engineering and operating Linux at scale across ...

New

IMC

Linux Engineer

Chicago, IL · On-site

$150K - $225K/yr

We're seeking a Linux Engineer with deep systems expertise and Python/scripting experience to join our growing global team. You will be responsible for engineering and operating Linux at scale across ...

IMC

Linux Engineer

Chicago, IL · On-site

$150K - $225K/yr

We're seeking a Linux Engineer with deep systems expertise and Python/scripting experience to join our growing global team. You will be responsible for engineering and operating Linux at scale across ...

New

Alpha Nexus Group

Lead Linux Engineer

Chicago, IL · On-site

System Administration (primary function) Manage the server (Linux) and user (Windows) computer environment Troubleshoot and resolve hardware and user software issues Provision, install, and setup new ...

Infobahn SoftWorld Inc

Systems Engineer

Elgin, IL · On-site

VMWARE or virtual machine skill, UNIX/Linux skills. Additional details: Top 3 soft skills: Team ... Learning system programming Helping others program their systems Learn system networking concepts

Sentinel

Linux Systems Administrator

Chicago, IL · On-site

$82K - $110K/yr

... system availability, performance tuning, automation, patching, monitoring, security, disaster recovery, and infrastructure upgrades across data centers and manufacturing locations. The engineer will ...

Sentinel

Linux Systems Administrator

Chicago, IL · On-site +1

$82K - $110K/yr

... system availability, performance tuning, automation, patching, monitoring, security, disaster recovery, and infrastructure upgrades across data centers and manufacturing locations. The engineer will ...

Sentinel

Linux Systems Administrator

Chicago, IL · Hybrid

$82K - $110K/yr

... system availability, performance tuning, automation, patching, monitoring, security, disaster recovery, and infrastructure upgrades across data centers and manufacturing locations. The engineer will ...

Sonsoft Inc

Hadoop Developer

Chicago, IL · On-site

Knowledge of HADOOP Framework and programming in Hive and Pig tools, Design, Best Practices and ... Understanding of Unix/Linux system, file systems, shell scripting * Experience with design and ...

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Unix Linux System Engineer information

What does a Unix Linux system engineer do?

On a daily basis, Unix Linux System Engineers are responsible for monitoring system performance, managing server configurations, applying security patches, and troubleshooting any system-related issues. They often collaborate closely with network administrators, database administrators, and application developers to ensure that all systems are running efficiently and securely. Effective communication and documentation are key, as system changes or incidents usually require coordination across multiple IT teams to minimize downtime and maintain service continuity.

What is a Unix Linux system engineer?

Unix Linux System Engineers are IT professionals responsible for designing, implementing, managing, and troubleshooting Unix and Linux-based operating systems and servers. They ensure systems are running efficiently, securely, and are regularly updated. Their duties often include system monitoring, performance tuning, automation with scripts, backup management, and supporting users or other IT staff. They play a critical role in maintaining the backbone of many enterprise IT infrastructures.

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

AspectUnix Linux System EngineerNetwork Administrator
CertificationsLinux+, RHCE, CompTIA Server+CCNA, Network+
Work EnvironmentData centers, server rooms, cloud environmentsOffice networks, enterprise LAN/WAN
ResponsibilitiesServer setup, scripting, system optimizationNetwork configuration, troubleshooting, security
Industry UsageIT, cloud services, hosting providersCorporate, telecommunications, education

The Unix Linux System Engineer primarily focuses on managing and optimizing Unix/Linux servers and systems, while the Network Administrator handles network infrastructure and connectivity. Both roles require technical certifications and work in IT environments, but their core responsibilities differ—system engineering versus network management.

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

To thrive as a Unix/Linux System Engineer, you need strong expertise in Unix/Linux operating systems, scripting (such as Bash or Python), networking fundamentals, and a relevant degree or equivalent experience. Familiarity with configuration management tools like Ansible or Puppet, virtualization platforms, and certifications such as Red Hat Certified Engineer (RHCE) are highly valuable. Analytical problem-solving, attention to detail, and effective communication help you excel in diagnosing issues and collaborating with teams. These skills are essential for maintaining system reliability, optimizing performance, and ensuring secure, uninterrupted IT operations.
What are popular job titles related to Unix Linux System Engineer jobs in Illinois? For Unix Linux System Engineer jobs in Illinois, the most frequently searched job titles are:
What job categories do people searching Unix Linux System Engineer jobs in Illinois look for? The top searched job categories for Unix Linux System Engineer jobs in Illinois are:
What cities in Illinois are hiring for Unix Linux System Engineer jobs? Cities in Illinois with the most Unix Linux System Engineer job openings:
Unix Linux System Engineer jobs near you
Infographic showing various Unix Linux System Engineer job openings in Illinois as of August 2026, with employment types broken down into 1% As Needed, 84% Full Time, 13% Part Time, and 2% Contract. Highlights an 92% Physical, 2% Hybrid, and 6% Remote job distribution.

Systems Engineer

Science Applications International Corporation

Scott Air Force Base, IL • On-site

Full-time

Posted 12 days ago

SAIC rating

7.9

Company rating: 7.9 out of 10

Based on 79 frontline employees who took The Breakroom Quiz

78th of 223 rated it services

Job 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. 

SAIC is a premier mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.

We are approximately 23,000 strong; driven by mission, united by purpose, and inspired by opportunities. SAIC is an Equal Opportunity Employer. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.3 billion. For more information, visit saic.com. For ongoing news, please visit our newsroom.

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

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