# Commissioning Site Mechanical Lead, Data Centers

**Company:** [Fluidstack](https://hotfix.jobs/companies/fluidstack)
**Location:** Austin, TX
**Role:** Hardware Engineering
**Salary:** $200k – $250k/yr
**Experience:** 10+ years
**Skills:** mechanical commissioning, data center mechanical systems, chillers, cooling towers, crah/crac units, ahus, cdus, direct-to-chip liquid cooling, hydronic piping, bms/bas integration, hydronic flushing, pressure testing, hydrostatic testing, aabc/nebb tab standards, testing & verification programs
**Posted:** 2026-07-19

> Lead mechanical commissioning (Levels 1-5) for high-performance data center cooling, heat rejection, and liquid cooling systems. Own testing/verification programs, documentation, on-site operations with contractors/vendors, and final handover. Requires 10+ years hands-on data center commissioning experience and Mechanical Engineering degree.

## Job Description

## Role Scope
- Lead mechanical commissioning across flushing, cooling, heat rejection, and liquid cooling systems for high performance data centers, spanning Level 1 through Level 5 commissioning phases.
- Drive the Testing & Verification program for mechanical cooling, heat rejection, and data hall thermal systems, working with commissioning agents and engineers from pre-site testing through on-site functional testing.
- Own commissioning documentation across multiple projects and sites, tracking issues, test results, and reports with enough rigor to hold up under an owner audit.
- Run on-site commissioning operations across general contractors, designers, and vendors: inspections, safety enforcement, progress tracking, and issue resolution.
- Close out final operational handover for mechanical systems, confirming every system is ready for service before occupancy.

## Requirements
- Minimum of 10 or more years of hands-on commissioning experience.
- Commissioned data center mechanical equipment firsthand: chillers, cooling towers, CRAH/CRAC units, AHUs, CDUs, direct-to-chip liquid cooling, pumps, hydronic piping, and BMS/BAS integration.
- Run hydronic flushing, cleaning, and pressure and hydrostatic testing on process piping.
- Know AABC/NEBB TAB standards well enough to catch a bad test result before it gets signed off.
- Built and executed Testing & Verification programs end to end, from pre-site functional testing through on-site startup, troubleshooting, and support.
- Show up in design and constructability reviews with commissioning and operations in mind, catching issues before they're built into concrete and steel.
- Keep commissioning records, issue logs, and test reports rigorous enough that any of them could stand up to an owner or insurer audit.
- Hold a degree in Mechanical Engineering.

## Nice-to-Haves
- ASHRAE or BCxA commissioning guideline experience.
- Controls or electrical systems knowledge.
- Hyperscale or mission-critical data center project experience.
- Managing multiple concurrent project sites.

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