Construction Commissioning Supervisor - Mechanical

Job Type: Full-time |
Location:Sweetwater, Texas |
Department: Construction |
Reporting to:Associate Director, Construction |
Work Location:#onsite

IREN is a vertically integrated AI Cloud provider, delivering large-scale data centers and GPU clusters for AI training and inference. IREN’s platform is underpinned by its expansive portfolio of grid-connected land and power in renewable-rich regions across North America, Europe and APAC.

We’re seeking a
Commissioning Supervisor - Mechanical to lead the installation, testing, and startup of mechanical systems in high-performance data centers. This role involves hands‑on commissioning of HVAC systems, liquid cooling infrastructure, and piping systems, ensuring all work meets stringent safety, quality, and performance standards.

With 100% renewable energy, we build, own and operate our data centers and take pride in being at the forefront of sustainable solutions for the ever-evolving applications of high-performance compute. We believe that human progress is invaluable, but it should be done in the right way – responsibly, sustainably and having a positive impact on the communities we operate in.

• High school diploma or equivalent required;
  Bachelor’s degree in mechanical engineering, construction management, or related field.
• Minimum of 5 years of experience in mechanical commissioning or construction management, with at least 2 years in data center or mission-critical environments.
• OSHA-30 certification (or must be obtained within six months of hire).
• Advanced understanding of OSHA regulations and company safety protocols.
• In-depth knowledge of mechanical systems including high-efficiency HVAC, chilled water, precision cooling, and liquid cooling technologies (e.g., CDU, immersion cooling, direct-to-chip).
• Proficient in interpreting P&IDs, mechanical drawings, commissioning scripts, and Change Management plans.
• Strong analytical and problem-solving skills with the ability to proactively identify and resolve issues.
• Demonstrated leadership and communication skills to manage diverse teams and complex projects. Strong technical writing and documentation capabilities.
• Familiarity with commissioning software, Building Management Systems (BMS), and project management tools such as Procore, Primavera, MS Project, and Microsoft Office Suite.

• Pre-employment screening, including background check and substance testing may be required according to company policies.
• Must provide own steel-toed work boots; all other PPE will be supplied.
• Must be able to reliably commute to the work operations site daily or have plans to relocate before starting work.
• Must be comfortable working a rotational schedule, which includes day and night shifts as well as weekend work, based on project needs.
• Employees working night shifts will receive a 15% premium added to their hourly rate only for hours worked during night shifts.

• Lead the commissioning of mechanical systems including HVAC, chilled water, and liquid cooling infrastructure.
• Verify mechanical installations against design specifications, performance benchmarks, and regulatory standards.
• Coordinate with subcontractors to ensure accurate installation, testing, and documentation of mechanical systems.
• Troubleshoot and resolve mechanical issues during startup, testing, and commissioning phases.
• Develop and implement Lockout/Tagout (LOTO) procedures to ensure safe energization and operation of mechanical systems.
• Conduct walk‑through inspections to confirm compliance with project specifications, safety protocols, and industry regulations.
• Inspect materials, manufactured components, and installation practices for adherence to contract and code requirements.
• Document inspection results, recommend corrective actions, and ensure timely resolution of non‑compliant issues.
• Provide QA/QC feedback throughout all phases of the project and support the development of risk mitigation strategies.
• Train and oversee subcontractor teams to ensure consistent compliance with company policies and procedures.
• Ensure all mechanical systems meet contractual obligations, regulatory codes, and safety…