Mechanical Commissioning Engineer

Full Job Description United States | USA About Rubicon Technical Services:

Rubicon Technical Servicesprovides engineering, technical, and project support services for complex and mission-critical environments. Our capabilities span commissioning, construction management, project management, quality assurance/quality control, operations, and maintenance.

We support clients on technically demanding projects where safety, reliability, quality, and operational readiness are essential.

• Data Centers
• Semiconductor
• Pharmaceutical
• Medical Device
• Automotive
• Mission-Critical Infrastructure

At Rubicon Technical Services, we believe strong results come from technical expertise, teamwork, accountability, and a commitment to doing the job right. Our people work collaboratively with clients, contractors, engineers, and project teams to deliver safe, reliable, and high-performing facilities.

We are currently hiring Mechanical Commissioning Engineers to support large-scale data center and mission-critical projects across the United States.

• Plan, execute, and manage commissioning activities for data center mechanical systems in accordance with approved commissioning plans, project specifications, and client requirements.
• Review mechanical designs, specifications, sequences of operation, equipment documentation, and commissioning procedures.
• Commission HVAC and mechanical systems, including chillers, cooling towers, CRAH/CRAC units, AHUs, pumps, heat rejection systems, and associated equipment.
• Oversee testing of chilled water, condenser water, fuel oil, and other mechanical systems, including flushing, cleaning, pressure testing, and chemical treatment.
• Verify air and water balancing (TAB) and confirm system performance under both design and part-load operating conditions.
• Coordinate and witness Factory Acceptance Testing (FAT), Site Acceptance Testing (SAT), pre-functional checks, and Functional Performance Testing (FPT).
• Participate in Integrated Systems Testing (IST) and coordinate testing activities with electrical, controls, BMS, and other commissioning teams.
• Review test results and identify deficiencies, operational issues, and performance gaps.
• Maintain and manage commissioning punch lists and verify completion of corrective actions.
• Prepare commissioning reports, test records, deficiency logs, turnover documentation, and final handover packages.
• Coordinate with contractors, vendors, consultants, clients, and project management teams throughout the commissioning process.
• Support client training, operational readiness, system turnover, and facility handover activities.
• Maintain accurate documentation and ensure commissioning activities are completed in accordance with project schedules and quality requirements.

• You have the authority to stop work when you identify an unsafe work practice that could result in injury, environmental impact, equipment damage, or risk to personnel.
• Perform all duties in accordance with applicable Health, Safety, Quality, and Environmental requirements.
• Follow established safety procedures, site rules, lockout/tagout requirements, and permit-to-work systems.
• Promote a strong safety culture and communicate potential hazards promptly to the appropriate project personnel.
• Ensure commissioning activities comply with applicable codes, standards, specifications, and project requirements.

• 5+ years of mechanical commissioning experience, preferably on mission-critical, hyperscale, or data center projects.
• Strong understanding of data center cooling architectures, redundancy strategies, and critical mechanical infrastructure.
• Hands-on experience…