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Infrastructure System Engineer Jobs in O Fallon, MO

Chief Systems Engineer

Saint Louis, MO · On-site

$120 - $160/hr

Assis the government in modernization of infrastructure and capabilities.* Oversee and coordinate the work of Senior-, Mid-, and Junior-level contractor Systems Engineers.**Required Qualifications ...

Sr Systems Engineer

Saint Louis, MO · On-site +1

$101K - $139K/yr

* Work with operational IT technical leads, senior developers to identify tasks and various needs ... Work with infrastructure and business team and resolve complex system issues and gaps. * Identify ...

Showing results 41-60

Infrastructure System Engineer information

See O Fallon, MO salary details

$43.5K

$118.9K

$170.3K

How much do infrastructure system engineer jobs pay per year?

As of Aug 11, 2026, the average yearly pay for infrastructure system engineer in O'Fallon, MO is $118,868.00, according to ZipRecruiter salary data. Most workers in this role earn between $100,600.00 and $131,900.00 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 O'Fallon, MO? For Infrastructure System Engineer jobs in O'Fallon, MO, the most frequently searched job titles are:
What job categories do people searching Infrastructure System Engineer jobs in O'Fallon, MO look for? The top searched job categories for Infrastructure System Engineer jobs in O'Fallon, MO are:
What cities near O'Fallon, MO are hiring for Infrastructure System Engineer jobs? Cities near O'Fallon, MO with the most Infrastructure System Engineer job openings:
Infographic showing various Infrastructure System Engineer job openings in O'Fallon, MO as of August 2026, with employment types broken down into 1% As Needed, 81% Full Time, 15% Part Time, and 3% Contract. Highlights an 92% Physical, 2% Hybrid, and 6% Remote job distribution, with an average salary of $118,868 per year, or $57.1 per hour.

Chief Systems Engineer

KBR, Inc

Saint Louis, MO • On-site

$120 - $160/hr

Other

Posted 5 days ago


KBR rating

8.3

Company rating: 8.3 out of 10

Based on 47 frontline employees who took The Breakroom Quiz

139th of 446 rated engineering


Job description

## Chief Systems EngineerApplylocations: Saint Louistime type: Full timeposted on: Posted Todayjob requisition id: R2123566**Title:**Chief Systems Engineer**Belong. Connect. Grow. with KBR!**KBR’s National Security Solutions team provides high-end engineering and advanced technology solutions to our customers in the intelligence and national security communities. In this position, your work will have a profound impact on the country’s most critical role – protecting our national security.**Why Join Us?*** Innovative Projects: KBR’s work is at the forefront of engineering, logistics, operations, science, program management, mission IT and cybersecurity solutions.* Collaborative Environment: Be part of a dynamic team that thrives on collaboration and innovation, fostering a supportive and intellectually stimulating workplace.* Impactful Work: Your contributions will be pivotal in designing and optimizing defense systems that ensure national security and shape the future of space defense.**This is a contingent position based upon contract award**KBR is seeking a Chief Systems Engineer to support a procurement providing Systems Engineering and Integration (SE&I) support to an IC/DoD government customer within the Washington DC Metropolitan area.The Chief Systems Engineers will assist in leading engineering teams in taking a multi-discipline approach to requirements engineering, solutions engineering, scheduling, reliability, resiliency, services development, integration, test and evaluation, maintainability and analysis across the NSG, ASG, and Federal Agencies to ensure timely and accurate GEOINT.**Primary Responsibilities:*** Assist the Government in directing requirements engineering, solutions engineering, scheduling, reliability, resiliency, services development, integration, test and evaluation, maintainability and analysis across the NSG, ASG and Federal Agencies.* Assist with the planning, analysis/traceability of user requirements, architecture traceability, procedures, and problems to automate or improve existing systems and review cloud service capabilities, workflow, and scheduling limitations.* Advise the Government on proposed changes to the solution designs based on analysis of requirements and new technology.* Assist the Government in the capture and translation of mission and customer requirements/needs into systems/capability requirements and solutions.* Support the analysis and allocation of requirements to systems architecture components and executing programs.* Assist the Government in performing systems integration activities.* Assist in leading AoAs, CoAs, Trade Studies, and Engineering Assessments.* Assist the Government in strategic technical planning, project management, performance engineering, risk management and interface design.* Provide expert advice to the Government in the areas of relating vision, strategy, plans, needs, requirements, process, and capability developments.* Assis the government in modernization of infrastructure and capabilities.* Oversee and coordinate the work of Senior-, Mid-, and Junior-level contractor Systems Engineers.**Required Qualifications:*** 18+ years of experience* Master’s degree or higher in Systems Engineering or in related technical or scientific fields such as engineering, physics, mathematics, operations research, engineering management, Computer Science, Information Technology, Management Information Systems, or related STEM degree.* **Active TS/SCI with the ability to obtain a Poly required*** Expert-level experience in relevant work areas including DoD/IC Acquisition Process, Requirements Process, Planning Programming, Budgeting, and Execution System (PPBES)* Process, or system engineering of large complex System of Systems or Service Oriented Architecture/Cloud environments.* Expert-level experience with systems engineering lifecycle.* Extensive experience within the DoD/IC.**Desired Qualifications:*** Demonstrated experience with MBSE, processes, tools and languages.* Software Development Framework certification.* INCOSE Expert System Engineering Professional (ESEP) certification.* Demonstrated experience in the field of geospatial intelligence.* Demonstrated experience in the development of Digital Engineering Ecosystems and Digital Twins.* Demonstrated knowledge of the current NSG/ASG and other IC Enterprises.**Additional Compensation:**KBR may offer bonuses, commissions, or other forms of compensation to certain job titles or levels, per internal policy or contractual designation. Additional compensation may be in the form of sign on bonus, relocation benefits, short-term incentives, long-term incentives, or discretionary payments for exceptional performance.**Ready to Make a Difference?**If you’re excited about making a significant impact in the field of space defense and working on projects that matter, we encourage you to apply and join our team at KBR. Let's shape the future together. #J-18808-Ljbffr

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About KBR

Sourced by ZipRecruiter

At KBR, we partner with government and industry clients to provide purposeful and comprehensive solutions with an emphasis on efficiency and safety. With a full portfolio of services, proprietary technologies and expertise, our employees are ready to handle projects and missions from planning and design to sustainability and maintenance. Whether at the bottom of the ocean or in outer space, our clients trust us to deliver the impossible on a daily basis.

Industry

It services

Company size

10,000+ Employees

Headquarters location

Houston, TX, US

Year founded

1998