Mechanical Commissioning Engineer, Capacity Delivery

Jobtailor; Austin (TX); On-site; USD 120,000 - 180,000; Full time

Job summary

Fluidstack in Austin is seeking a commissioning engineer to lead mechanical systems testing for gigawatt-scale data centers, ensuring performance and reliability from Level2 through Level5 integration.

You will write test procedures from sequences of operation, read P&IDs and drawings fluently, troubleshoot live systems with vendors, and contribute to faster site ramp-ups with practical feedback.

Qualifications

• Experience commissioning mechanical plant on mission-critical facilities.
• Ability to read P&IDs and controls drawings fluently.
• Experience writing test procedures from sequences of operation.
• Ability to troubleshoot live systems under deadlines.

Responsibilities

• Commission mechanical systems for data centers at scale.
• Write and execute test scripts validating capacity and response.
• Run functional and integrated tests with controls and electrical teams.
• Incorporate test findings into design improvements.

Skills

Commissioning experience

P&IDs & controls drawings

Test procedures writing

Live systems troubleshooting

Job description

About Fluidstack

We exist to make humanity more free. For most of human history, you farmed or you starved. Technology gave people more time for the things they wanted to do, instead of things they had to do. Powerful AI will be the biggest lever for human choice we've ever built - but only if models are aligned with what humanity actually wants. There are groups building AI who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks it.

We're singularly focused on delivering 10 to 100s of GW of compute faster than anyone else, rethinking every layer of the stack. We acquire power, design and build data centers, and operate them - with teams spanning hardware and software. Speed and scale are our key differentiators. Come be a part of building civilization‑scale infrastructure for AI.

How We Operate

• Extreme ownership. Full autonomy. Own things end to end often taking on scope outside your core role without being asked to get things done.
• Velocity. We drive everything forward as fast as possible.
• First principles. Challenge every assumption. Zero analogy thinking, no egos, the best idea wins.
• Love of the game. The frontier of AI is the most interesting problem of our time. We put in long hours at high intensity to push the frontier forward.

The Commissioning Team

Examples of key problems the team is working on

• Stand up the commissioning program for 50GW+ of capacity this decade.
• Run commissioning and QA‑QC for first‑of‑a‑kind modular data centers.
• Automate Level 4 and Level 5 commissioning.

Role Scope

• Commission mechanical systems for gigawatt‑scale data centers: chilled water plants, CDUs, liquid loops, and airside systems from Level2 through Level5.
• Write and execute test scripts that prove capacity, redundancy, and failure response, not just that equipment turns on.
• Run functional and integrated systems tests with controls and electrical so the building performs as one system.
• Feed test findings back into the standard design so the next site commissions faster.

What We're Looking For

• You've commissioned mechanical plant on mission‑critical facilities through integrated systems testing.
• You've written test procedures from sequences of operation, and found where the sequence was wrong.
• You read P&IDs and controls drawings fluently.
• You troubleshoot live systems with vendors watching and a deadline standing behind you.
• Bonus: Liquid cooling and direct‑to‑chip systems. CxA credential. Modular data centers. Test and balance oversight.

We are committed to pay equity and transparency. Fluidstack is an Equal Employment Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability and protected veterans' status, or any other characteristic protected by law. Fluidstack will consider for employment qualified applicants with arrest and conviction records pursuant to applicable law.