Commissioning Agent (CxA) for AI / HPC high-density and liquid cooling builds
A commissioning agent on a liquid cooled AI hall is an independent witness to water systems, power systems and the controls that tie them together under loads that swing in seconds. You are hiring someone to write test procedures, watch the contractor's start-up, and refuse to sign a sheet when the examples does not match the design intent.
This is what we do all day: recruit data center professionals.
No upfront fee. You pay only if you hire.
No upfront fee. You pay only if you hire.
We offer a candidate replacement guarantee on standard search agreements. The applicable period and exact terms are set out in the signed client recruiting agreement.
- No upfront fee
- Pay only if you hire
- Data centers only, construction to operations
- Local and 100% travel candidates
- Replacement guarantee on standard searches
- Commissioning Agent (CxA)
- Commissioning Authority
- Commissioning Provider
- Cx Agent
What does this hire really come down to?
The agent owns the test plan and the pass or fail call on witnessed tests. They do not own the design, the installation or the contractor's schedule recovery, and a good one says so out loud when pressure arrives.
Liquid cooling adds a fluid side to the work: flushing and filtration records, pressure holds, flow balancing at coolant distribution units, leak response, and what happens to racks when a pump trips. Ask which of those they personally witnessed versus read about in a report.
Adjacent levels differ in reach. A junior agent follows scripts someone else wrote, while a lead agent builds the integrated systems test and defends it in front of the owner's operations team.
What do we check before you see anyone?
Ask them to walk through a failure they caught during functional testing of a cooling loop, and what they wrote on the issues log afterwards. Vague stories about 'coordination' suggest they watched rather than tested. Have them explain how they would test a thermal ramp when the IT load is simulated by load banks instead of servers.
- Ask them to walk through a failure they caught during functional testing of a cooling loop, and what they wrote on the issues log afterwards. Vague stories about 'coordination' suggest they watched rather than tested.
- Have them explain how they would test a thermal ramp when the IT load is simulated by load banks instead of servers. A strong answer covers the difference between air side and liquid side heat rejection.
- Check which commissioning levels they have led, and whether they wrote the procedures or only executed templates supplied by the owner.
How we help you hire
- 01
Tell us who you need
Tell us about the role, experience, location and pay. We talk through what matters to you.
- 02
We find and speak with candidates
We approach suitable people directly, including people who are not applying to job ads.
- 03
You meet the strongest matches
We explain their background, interest in the job and our view. You decide who to interview.
- 04
We help you complete the hire
We help with feedback, the offer and start arrangements, and stay in touch as you make your decision.
Where do we find these candidates?
Mechanical test and balance or controls backgrounds that moved into witnessing, useful if the owner wants someone who understands how fluid loops are proven to move correctly. Operators who ran critical facilities and later crossed over, who bring a real feel for what a failed pump does at three in the morning.
- Commissioning providers that serve enterprise and colocation owners, where agents learn to write rigorous scripts for chilled water and power systems before they meet liquid cooling.
- Mechanical test and balance or controls backgrounds that moved into witnessing, useful if the owner wants someone who understands how fluid loops are proven to move correctly.
- Operators who ran critical facilities and later crossed over, who bring a real feel for what a failed pump does at three in the morning.
Which hiring mistakes should you avoid?
Do not hire a general building commissioning agent whose experience is air handlers and VAV boxes, then expect them to judge coolant distribution without supervision. Do not let the agent report to the contractor. An agent paid or directed by the party being tested cannot hold a line.
- Hiring a general building commissioning agent whose experience is air handlers and VAV boxes, then expecting them to judge coolant distribution without supervision.
- Letting the agent report to the contractor. An agent paid or directed by the party being tested cannot hold a line.
- Treating liquid cooling as a niche trade credential. No certificate substitutes for witnessed start-ups on real loops.
Questions we settle before outreach
- Define the independence line
We confirm who the agent reports to, what authority they have to stop a test, and who receives the issues log.
- Map the systems and screen on witnessed work
You tell us the cooling architecture, power topology and controls platform so we search for matching exposure. Conversations focus on tests they personally ran, procedures they authored and disputes they resolved.
- Present a short list
You receive candidates with notes on test work, level experience and any gaps against your loop design.
Questions that separate witnessing from watching
Ask the candidate to describe a flow balance on a secondary loop: who set the valves, what instruments they used, what the differential pressure did and how they knew the number was right. People who watched will speak in outcomes. People who tested will mention the awkward detail, such as a strainer that clogged during the flush.
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Questions
How early can a shortlist of liquid cooling commissioning agents appear?
It depends on how rare your specific cooling architecture is and how firm your independence requirements are. We will give you an honest read after the intake call, without promising a number of days.
What if a candidate's current commissioning firm counters when we make an offer?
Agents often stay when their current employer is mid-project, so we ask early what would make them move. We also discuss with you whether a start date after their current commissioning phase closes is acceptable.
Will an agent move to a site far from a metro area for a flushing and start-up phase?
Agents who follow projects usually accept a distant site if the test phase has a clear end. Say whether you will pay for lodging in a rental or hotel, because that decides who replies.
How should we treat per diem when the agent travels to witness coolant distribution start-ups?
Decide whether per diem covers the whole test phase or only weeks on site, and whether rental transport is included. Agents compare these terms side by side across offers.
How can our mechanical lead tell whether an agent is a good match for our team?
Ask for the test scripts they wrote, redacted of client details, and have your mechanical lead question them about thermal ramps. Fit shows in how they handle a failing test they cannot yet explain.
Which terms of the engagement should we clarify before we ask for an agent's availability?
Terms are written down and agreed before we approach anyone, so you can compare them with other ways of filling the seat. Ask us at intake about anything that is unclear, including how a contract to hire arrangement would be treated.
Start your search
Related hiring resources
- Commissioning Agent (CxA) recruiting
- AI / HPC high-density and liquid cooling builds
- Hiring guide: Commissioning & Quality
- Every Commissioning & Quality title
- How long a search takes
- Interview questions for Commissioning Agent (CxA)
- Commissioning levels 1 to 5 explained for hiring managers
- Commissioning agent versus commissioning manager
What should you know before you send a role?
What does it cost to hire through Data Center Headhunters?
No upfront fee. You pay only if you hire. Fee terms are set out in the signed recruiting agreement.
How do you handle counteroffers?
We talk about why the person wants to move and whether they might stay. If that changes, we let you know.
Is there a guarantee?
We offer a candidate replacement guarantee on standard search agreements. The applicable period and exact terms are set out in the signed client recruiting agreement.
What don't you do?
We do not post your job on boards, send stacks of unscreened resumes or charge an upfront fee. We do not approach candidates for your search before the brief is agreed with you.
Need this person?
No upfront fee. You pay only if you hire.
We offer a candidate replacement guarantee on standard search agreements. The applicable period and exact terms are set out in the signed client recruiting agreement.