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Senior Infrastructure Engineer Jobs in O Fallon, IL

Stifel

Sr Observability Engineer

Saint Louis, MO · On-site

$105K - $143K/yr

The Sr Observability Engineer will support the design, implementation, and optimization of ... Experience with Infrastructure as Code. * Minimum Required: Bachelor's degree in IT or related ...

Stifel

Sr Observability Engineer

Saint Louis, MO · On-site

$105K - $143K/yr

What You'll Be Doing The Sr Observability Engineer will support the design, implementation, and ... Experience with Infrastructure as Code. Education & Experience * Minimum Required: Bachelor ...

Stifel

Sr Observability Engineer

Saint Louis, MO · On-site

$105K - $143K/yr

What You'll Be Doing The Sr Observability Engineer will support the design, implementation, and ... Experience with Infrastructure as Code. Education & Experience * Minimum Required: Bachelor ...

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All JobsInfrastructure Engineer JobsSenior Infrastructure Engineer JobsSenior Infrastructure Engineer Jobs in O'Fallon, IL

Senior Infrastructure Engineer information

See O Fallon, IL salary details

$21K

$118.4K

$163.7K

How much do senior infrastructure engineer jobs pay per year?

As of Aug 6, 2026, the average yearly pay for senior infrastructure engineer in O'Fallon, IL is $118,438.00, according to ZipRecruiter salary data. Most workers in this role earn between $101,200.00 and $137,600.00 per year, depending on experience, location, and employer.

What is a senior infrastructure engineer?

Senior Infrastructure Engineers are experienced IT professionals responsible for designing, implementing, maintaining, and optimizing an organization’s core technology infrastructure. This includes servers, networks, cloud environments, and related systems that support business operations. They often lead projects, troubleshoot complex issues, and ensure the reliability, security, and scalability of the infrastructure. In addition to technical expertise, they may mentor junior engineers and collaborate with other departments to align technology with business goals.

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

AspectSenior Infrastructure EngineerNetwork Engineer
CredentialsBachelor's in Computer Science or related, certifications like Cisco CCNA/CCNP, AWS, or AzureBachelor's in Computer Science or related, Cisco CCNA/CCNP, CompTIA Network+
Work EnvironmentDesigning, implementing, and maintaining IT infrastructure, servers, cloud servicesConfiguring, managing, and troubleshooting network hardware and connectivity
Employer & Industry UsageTech companies, data centers, large enterprisesTelecommunications, IT service providers, corporate networks

While both roles require networking knowledge and certifications, Senior Infrastructure Engineers focus on overall infrastructure design and cloud integration, whereas Network Engineers specialize in network hardware and connectivity. The Senior Infrastructure Engineer role is broader, often overseeing multiple systems, while Network Engineers concentrate on network-specific tasks.

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

To thrive as a Senior Infrastructure Engineer, you need deep expertise in network architecture, server management, cloud platforms, and a relevant degree or certifications like AWS Certified Solutions Architect or Microsoft Certified: Azure Administrator. Proficiency with infrastructure-as-code tools (e.g., Terraform, Ansible), virtualization platforms, and monitoring systems is typical in this role. Strong problem-solving skills, leadership, and effective communication help you manage complex projects and collaborate across teams. These skills ensure reliable, secure, and scalable IT environments that support organizational goals.

What are some common challenges faced by senior infrastructure engineers when supporting large-scale systems?

Senior Infrastructure Engineers often encounter challenges such as ensuring high availability and reliability of systems, managing complex migrations, and optimizing performance under heavy workloads. Coordinating with development and security teams is essential to implement infrastructure changes without disrupting services. Additionally, staying ahead of evolving technologies and automating routine tasks can be demanding but crucial for efficiency and scalability. Successfully navigating these challenges requires strong technical expertise, proactive problem-solving, and effective cross-team communication.
What cities near O'Fallon, IL are hiring for Senior Infrastructure Engineer jobs? Cities near O'Fallon, IL with the most Senior Infrastructure Engineer job openings:
Senior Infrastructure Engineer jobs near you
Infographic showing various Senior Infrastructure Engineer job openings in O'Fallon, IL as of August 2026, with employment types broken down into 85% Full Time, 7% Part Time, 5% Contract, and 3% Nights. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution, with an average salary of $118,438 per year, or $56.9 per hour.

Senior Infrastructure Engineer

Moore Computing LLP

Saint Louis, MO • On-site

$105K - $143K/yr

Full-time

Re-posted 2 days ago

Job description

Salary:

Sr. Infrastructure/Cloud Engineer




Overview


If you are an experienced infrastructure or cloud engineer with a passion for designing, implementing and supporting cloud (Azure) and on-premise infrastructure solutions, Moore Computing may be the destination you have been looking for!


Moore Computing is seeking experienced infrastructure engineers to exceed the needs of our growing customer base and rapidly expanding portfolio of customers migrating to Microsoft Azure!


What You Will be Doing


  • Act as a lead technical resource to multiple customers guiding their technology adoption to accelerate their business.
  • Work with a multi-tiered team of experienced engineers to deliver world-class support and solutions.
  • Assess, design and implement on-premise and cloud infrastructure solutions
  • Work with end users and client network administrators to resolve technical issues and share technical experience to elevate others
  • Develop technology plans for customers based on customer interactions and needs.
  • Respond and resolve critical issues (emergencies) when they arise to quickly restore service levels and develop action plans to prevent similar service disruptions in the future.
  • Continually working to elevate your own technical and professional skills through self-study, R&D, and shared experiences from others.
  • Work will be performed in various locations: on-premise (in and around the St. Louis area), at the Moore Computing offices, and remotely.


Desired Skills and Abilities


  • 5 years of experience delivering technology solutions and support for multiple customers.
  • Extensive experience supporting the Microsoft stack of products (Windows Server, Windows 7/10, Office365, and more)
  • A proven track record of successfully diagnosing and resolving both complex and simple technology challenges
  • Must be able to pass a background check




Behaviors


  • A passion for delivering world-class service!
  • Be a productive member of multiple teams to deliver service and solutions
  • A deep desire to learn new technologies and grow professionally
  • Be a teacher/mentor to others in areas that you have experience, and a student of those that have knowledge to share
  • Ability to quickly change direction and react to changes in priorities and work assignments in a fast-paced environment
  • Communicate in a clear, concise, direct, and respectful manner




Whats in it for You


  • Competitive salary
  • Strong benefits package
  • Career training and experience
  • Opportunities to work with the latest technologies
  • Advancement opportunities
  • Leadership opportunities




Not ready for this challenge or looking to apply your skills and abilities in a different role? Moore Computing has many other opportunities. We are seeking top talent at all skill levels, including project managers, automation gurus, desktop engineers, long-term IT staffing, Support Center (help desk) and more!