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Fluidstack is building civilization-scale AI compute infrastructure, acquiring power, designing and operating data centers at unprecedented speed and scale. The Commissioning Team is responsible for standing up commissioning programs for 50+ GW of capacity this decade, including first-of-a-kind modular data centers.
As Commissioning Site Manager, you will act as the Owner's representative across multiple sites, directing general contractors, designers, commissioning agents, and vendors through comprehensive commissioning (Levels 1–5) of chilled water, HVAC, electrical, building management systems (BMS), and energy management systems (EPMS). You will witness and verify all pre-functional and functional testing in the field, including flushing, pressure testing, test and balance, equipment startup, sequence of operations validation, NETA acceptance testing, and integrated systems tests.
Key responsibilities include reviewing commissioning plans, method of procedure documents, test scripts, and vendor startup reports against ASHRAE, BCxA, and NETA standards before field deployment. You will own the commissioning schedule and issues log for each site, surfacing failed tests, punch items, and vendor readiness gaps early to protect energization and turnover dates. You will troubleshoot startup and performance issues on mechanical plant, electrical distribution, and controls; isolate root causes to design, installation, controls, or equipment; and drive fixes through the responsible party. You will maintain current issues logs, test records, and turnover packages so facilities teams can operate plants on day one, and provide written briefings to GCs, designers, and owners that drive decisions.
Fluidstack operates with full autonomy, insane urgency, first-principles reasoning, and a focus on building something that matters. The company is committed to pay equity and transparency.
REQUIREMENTS:
- Served as Owner's commissioning lead on hyperscale or mission-critical data center builds, holding contractors, designers, commissioning agents, and vendors to test plans and schedules
- Personally witnessed and signed off Level 1–5 testing on mechanical plant: chillers, cooling towers, dry coolers, pumps, CRAH/CRAC units, AHUs, MAUs, computer room ventilation, heat exchangers, expansion tanks, pressurization units, water treatment, piping distribution, control valves, VFDs, leak detection, fuel oil transfer, and BMS/HVAC control sequences
- Personally witnessed and signed off Level 1–5 testing on electrical systems: generators, paralleling switchgear, HV/MV/LV transformers and switchgear, main switchboards, UPS and battery systems, ATS/STS, PDUs, busways, RPPs, grounding, lighting controls, PLC-based automatic and semi-automatic switching controls, and EPMS
- Test to NETA specifications and run commissioning to ASHRAE or BCxA guidelines; catch when commissioning scripts or vendor reports do not meet standards
- Diagnosed startup failures under schedule pressure, traced them to design, installation, controls, or equipment, and driven fixes through the responsible party
- Maintain issues logs, test records, and turnover packages current enough for day-one operations; provide written briefings that lead to decisions
BONUS:
- BSc or MSc in mechanical or electrical engineering
- BCxA or ASHRAE commissioning certification (CxA, CBCP, or similar)
- Commissioning of first-of-a-kind modular data centers
- Level 4 and Level 5 test automation
- Water treatment and fuel oil system commissioning at campus scale
