Onsite Mission-Critical Mechanical Engineer

STN, Inc.; Marshfield (MO); On-site; USD 90,000 - 115,000; Full time

Benefits offered by this job

Health Coverage – Medical, Dental &amp

401(k) Plan

Unlimited PTO

Holidays Paid

Cell phone allowance

Collaborative culture

Job summary

STN, Inc. is seeking a Critical Infrastructure Mechanical Engineer to support mission-critical facilities in Marshfield, MO.

The role covers design, construction, commissioning, operation, and maintenance of complex mechanical systems and data center infrastructure. The ideal candidate has 3+ years of experience in industrial or data center environments, strong RCA and HVAC knowledge, and the ability to work cross-functionally with operations and controls teams.

Qualifications

• Bachelor’s Degree in Mechanical Engineering.
• 3+ years of experience in supporting industrial, commercial, utility, power generation, oil & gas, or data center facilities.
• Experience with mission-critical infrastructure design, operation, maintenance, or construction.
• Strong understanding of integrated mechanical and electrical systems.
• Ability to read and interpret engineering drawings, specifications, submittals, and applicable building codes.

Responsibilities

• Provide full lifecycle engineering support for mission-critical facilities from design inception through construction, commissioning, operation, and ongoing maintenance.
• Serve as the primary mechanical engineering resource for regional infrastructure projects and operational teams.
• Lead troubleshooting efforts, root cause analyses (RCA), and corrective action development for critical equipment and system failures.
• Support operational excellence through technical reviews, procedure development, equipment assessments, and training initiatives.
• Design and implement upgrade projects that increase capacity, improve reliability, enhance energy efficiency, and support sustainability objectives.
• Collaborate closely with operations, construction, commissioning, controls, environmental health and safety, and design teams to maintain engineering standards and operational consistency.
• Conduct engineering audits and site assessments, identifying operational risks and developing mitigation strategies.
• Support new construction projects as a resident engineer, ensuring successful installation, commissioning, startup, and system turnover.
• Manage multiple concurrent projects across various locations while maintaining schedule, budget, quality, and safety objectives.
• Develop innovative engineering solutions that improve facility performance, resilience, and long-term maintainability.

Education

Bachelor’s Degree in Mechanical Engineering

Job description

STN, Inc. is seeking a Critical Infrastructure Mechanical Engineer to support mission-critical facilities in Marshfield, MO.

The role covers design, construction, commissioning, operation, and maintenance of complex mechanical systems and data center infrastructure. The ideal candidate has 3+ years of experience in industrial or data center environments, strong RCA and HVAC knowledge, and the ability to work cross-functionally with operations and controls teams.