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Infrastructure System Engineer Jobs in St Louis, MO

SAIC

Systems Engineer

Scott Air Force Base, IL

$40K - $80K/yr

... system management tools * Proactively ensure the highest levels of systems and infrastructure ... developers to implement those fixes * Maintain security, backup, and redundancy strategies

SAIC

Systems Engineer

Scott Air Force Base, IL · On-site

$40K - $80K/yr

... system management tools * Proactively ensure the highest levels of systems and infrastructure ... developers to implement those fixes * Maintain security, backup, and redundancy strategies

teKnoluxion

Linux Systems Engineer

Saint Louis, MO · On-site

Overview Linux Systems Engineer Springfield, VA or St. Louis, MO Active TS (SCI eligibility ... Standardize system configuration, patching, and deployment processes through Infrastructure-as-Code ...

GDIT

Linux Systems Engineer

Saint Louis, MO · On-site

None Job Family: IT Infrastructure and Operations Job Qualifications: Skills: Linux System ... The Linux Systems Engineer is an active participant in SAFe and Scrum development teams and ...

GDIT

Linux Systems Engineer

Saint Louis, MO · On-site

None Job Family: IT Infrastructure and Operations Job Qualifications: Skills: Linux System ... The Linux Systems Engineer is an active participant in SAFe and Scrum development teams and ...

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All JobsInfrastructure System Engineer JobsInfrastructure System Engineer Jobs in St. Louis, MO

Infrastructure System Engineer information

See St Louis, MO salary details

$45.2K

$123.5K

$176.9K

How much do infrastructure system engineer jobs pay per year?

As of Aug 13, 2026, the average yearly pay for infrastructure system engineer in St. Louis, MO is $123,537.00, according to ZipRecruiter salary data. Most workers in this role earn between $104,500.00 and $137,100.00 per year, depending on experience, location, and employer.

What does an infrastructure system engineer do?

An infrastructure system engineer designs, implements, and maintains an organization’s IT infrastructure, including servers, networks, and storage systems. They troubleshoot hardware and software issues, optimize system performance, and ensure security and reliability, often using tools like virtualization and cloud platforms. Strong knowledge of networking, scripting, and certifications such as Cisco or Microsoft are common in this role.

How much do infrastructure system engineers get paid?

Infrastructure system engineers typically earn a median annual salary ranging from $70,000 to $110,000, depending on experience, location, and industry. Salaries can increase with certifications such as Cisco or Microsoft, and those working in large organizations or specialized fields may earn higher compensation.

What is the difference between Infrastructure System Engineer vs Network Engineer?

AspectInfrastructure System EngineerNetwork Engineer
CertificationsCompTIA Network+, Cisco CCNA, Microsoft certificationsCompTIA Network+, Cisco CCNA, Juniper JNCIA
Work EnvironmentData centers, server rooms, cloud environmentsNetwork operations centers, enterprise networks
Industry UsageIT infrastructure, cloud services, enterprise systemsTelecommunications, enterprise networking, internet service providers

While both roles require networking certifications and involve working with IT infrastructure, Infrastructure System Engineers focus on overall system architecture, servers, and cloud integration, whereas Network Engineers specialize in designing, implementing, and maintaining network hardware and connectivity. Understanding these differences helps employers and candidates align skills with job requirements.

What are some common challenges faced by infrastructure system engineers when managing large-scale systems?

Infrastructure System Engineers often encounter challenges such as ensuring system scalability, maintaining high availability, and minimizing downtime during updates or incidents. Monitoring and proactively addressing security vulnerabilities across complex, distributed environments is another critical aspect. Collaborating with cross-functional teams, such as development and operations, is essential to align infrastructure changes with business goals and rapidly address emerging issues. Staying current with evolving technologies and best practices helps in overcoming these challenges effectively.

What are the key skills and qualifications needed to thrive as an infrastructure system engineer?

To thrive as an Infrastructure System Engineer, you need a strong background in systems administration, networking, and IT infrastructure management, usually backed by a degree in computer science or a related field. Familiarity with tools like VMware, Microsoft Azure, AWS, Linux/Windows servers, and certifications such as CompTIA Network+, Microsoft Certified: Azure Administrator, or AWS Certified Solutions Architect are typically required. Problem-solving, teamwork, and effective communication are essential soft skills for collaborating across departments and responding to critical incidents. These skills and qualifications are crucial for maintaining reliable, secure, and scalable IT environments that support business operations.
What are popular job titles related to Infrastructure System Engineer jobs in St. Louis, MO? For Infrastructure System Engineer jobs in St. Louis, MO, the most frequently searched job titles are:
What job categories do people searching Infrastructure System Engineer jobs in St. Louis, MO look for? The top searched job categories for Infrastructure System Engineer jobs in St. Louis, MO are:
What cities near St. Louis, MO are hiring for Infrastructure System Engineer jobs? Cities near St. Louis, MO with the most Infrastructure System Engineer job openings:
Infrastructure System Engineer jobs near you
Infographic showing various Infrastructure System Engineer job openings in St. Louis, MO as of August 2026, with employment types broken down into 92% Full Time, and 8% Temporary. Highlights an 85% In-person, and 15% Hybrid job distribution, with an average salary of $123,537 per year, or $59.4 per hour.

System Engineer (Unix)

By Light Professional IT Services LLC

Scott Air Force Base, IL • On-site

Full-time

Posted 22 days ago

Job description

Company Overview

By Light Professional IT Services LLC readies warfighters and federal agencies with technology and systems engineered to connect, protect, and prepare individuals and teams for whatever comes next. Headquartered in McLean, VA, By Light supports defense, civilian, and commercial IT customers worldwide.

Position Overview

By Light is supporting the Managed Information Technology Service (MITS) Enterprise Support Managed Services effort for the United States Transportation Command (USTRANSCOM). 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 perform systems engineering work to maintain, configure, and reliably operate network servers, server virtualization systems, laptops, desktops, VDI, and supporting software/hardware. 

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.

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.
Required Experience/Qualifications
  • Bachelor's degree and ten (10) years or more experience
  • One of these IAT Level II certifications: CompTIA Security + CE, CECCNA-Security, 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.
Preferred Experience/Qualifications
  • Master's degree
  • ITILv4 Foundations certification 
  • One of the IAM Level II certifications: CAP, CASP+ CE, CISM, CISSP (or Associate), GSLC, CCISO, HCISPP
Special Requirements/Security Clearance
  • DoD Secret clearance or higher; TS/SCI preferred
Employment Type: OTHER

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