Mechanical Commissioning Engineer; Data Centers

Experts Group International is a well-established and rapidly growing design-build firm seeking an experienced Mechanical Commissioning Engineer to support mission-critical data center projects across the U.S. This hands-on, field-based role focuses on commissioning and validating mechanical and HVAC systems to ensure performance, reliability, and compliance with design intent and owner requirements.

Responsibilities:

• Lead mechanical commissioning activities from planning through closeout (L1–L5)
• Verify installations against BOD, OPR, applicable codes, and manufacturer requirements
• Perform functional and performance testing of mechanical systems
• Commission HVAC and mission-critical cooling systems including chilled water, condenser water, CRAH/CRAC units, AHUs, pumps, valves, and controls
• Support Integrated Systems Testing (IST) in coordination with electrical and controls teams
• Develop commissioning scripts, test procedures, and load testing plans
• Produce daily reports and final commissioning documentation
• Act as on-site mechanical lead, coordinating with Owners, GCs, and trade partners
• Oversee QA/QC processes, safety compliance, and issue resolution
• Support training of operations and maintenance teams prior to handover

Requirements:

• Bachelor's degree in Mechanical Engineering or a related discipline
• 3–5+ years' experience in mechanical commissioning within data center environments
• Strong technical knowledge of HVAC and mission-critical cooling systems
• Proven experience with L1–L5 commissioning, IST, and technical documentation
• Familiarity with controls systems and sequences of operation
• Proficient with Bluebeam, CAD, and related tools
• Willingness to travel nationally and work on active construction sites