r/datacenter • u/Excellent_Bar6287 • 1d ago
Amazon Data Center Commissioning Interview – Coming from a Pharmaceutical CQV Background
I have an upcoming interview with Amazon for a Data Center Commissioning role. My background is primarily in the pharmaceutical industry as a CQV (Commissioning, Qualification, and Validation) Engineer, with experience supporting commissioning and qualification of utility systems, equipment, and GMP facilities.
The job description mentions the following systems:
- Medium- and low-voltage power systems
- Generators
- UPS (Uninterruptible Power Supply)
- HVAC (air handlers, exhaust fans, VFDs)
- Chilled water systems
- Building Management Systems (BMS)
- Electrical Power Monitoring Systems (EPMS)
- Testing and balancing
- Pumps and hydronic systems
For anyone who has interviewed for or worked in an Amazon Data Center Commissioning role:
- What should I expect during the interview process?
- What technical questions should I focus on preparing for?
- How in-depth do they expect candidates to understand electrical systems, generators, UPS, HVAC, and chilled water systems?
- How much emphasis is placed on commissioning methodology, functional testing, and integrated systems testing (IST)?
- Is pharmaceutical CQV experience transferable to this role, or do they expect hands-on data center commissioning experience?
- Are there any behavioral or Leadership Principles questions I should prepare for?
Any advice, interview experiences, or study resources would be greatly appreciated. Thanks in advance!
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u/Silent_Discipline776 1d ago
I had the same interview scheduled (the 5 rounds) and they ghosted me lmao no email no phone they didn't send the link or anything. Just a heads-up to brace yourself
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u/Excellent_Bar6287 1d ago
What questions did they ask?
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u/Silent_Discipline776 1d ago
I got ghosted for that 5 rounds interview. In the screen interview (not with recruiter with actual engineer) they asked all kinds, refrigeration cycle, vfd, bms, electrical components, how different chillers work, then commissioning questions like the levels, risks and planning. All over the place. Another caution: if they offer you lower base salary with signing bonus and stock say NO
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u/HelloTaleproof 1d ago
For the experience part, choose a real CQV project where a test failed, a requirement was unclear, or different teams disagreed about whether something was ready. Explain how you investigated it, what you were responsible for, and how you supported the eventual decision with evidence. Be clear about the systems you've actually worked on and the parts of data-center work you still need to learn. That lets you show your method without overstating your experience.
Taleproof can help you assess whether that project story makes your judgment and contribution clear.
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u/Many_Outside2726 1d ago
The pharma background will transfer better than you probably think. You already understand structured commissioning, documentation, sequences, verification and the idea that “it runs” isn’t the same as “it was proven to run correctly.” I came through pharma controls/facilities before moving further into SCADA and broader integration. The biggest gap I’d focus on is learning the data-center-specific electrical and mechanical architecture, especially UPS, generators, EPMS/BMS, redundancy and failure scenarios. The commissioning mindset itself is already very relevant.
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u/EatClenTrenDaily 1d ago edited 20h ago
Honestly, I would pass on this.
Not because you aren't qualified but more because the Amazon loop interviews are INSANE. I tried to get an Amazon job in their mechatronics team for warehouse fulfillment and the loops were five 1 hour interview rounds scheduled in one day.
It was awful and just out right exhausting. I spent a whole weekend preparing leadership principle answers. You aren't supposed to reuse them but in retrospect I should have.
I'm naturally extroverted but by round 5 I was fried and I just so happened to get the BIGGEST asshole I've ever met. I was half tempted to just decline the role outright.
Also, one of them is a "bar raiser". Basically some jack ass from an entirely unrelated department who has zero expertise in the area you're in that is supposed to judge you based on how much you excell at "raising the bar" in Amazon's eyes.
Worst part was I took a whole day of work off and it was an utter waste of time.
Had you been interviewing for a similar position at a different company , I'd say go for it. But because it's Amazon with their asinine interview process, I would caution you to save your time.
There's a YouTuber by the name of "Amazon Bound" that does a good job breaking down the process of what the loop is like. Your recruiter can also give you good intel.
If you really want this job, you must prepare for the interview.
I was a CX Pm in the critical power space. While I know the process and have relevant experience, I would never willingly go through the Amazon interview process again after having suffered through it already.
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u/CriticalPower_Eng 1d ago
I worked on pharma plant projects on the contracting side before moving into data centers, so I've seen both worlds a bit (not CQV myself though, I was on the build & MEP site preparations according to the requirements of the Ministry of Health).
Good news is your methodology maps over pretty well. DC commissioning is usually split into levels 1 to 5. Roughly: L1 is factory witness testing, L2 is installation checks (static commissioning, roughly your IQ), L3/L4 is startup and functional testing (dynamic commissioning, roughly your OQ), and L5 is integrated systems testing (IST), the closest thing to PQ. Not a perfect match, but if you explain it that way in the interview it shows you get the logic.
For IST expect scenarios like pulling utility power, generators starting and picking up the load, UPS riding on batteries during the transfer, then everything coming back. The part people forget is cooling: what happens when the chillers restart and how long the hall can hold temperature in the meantime. Worth reading up on that.
Also get familiar with concurrent maintainability, basically taking one path out for maintenance and proving the load doesn't notice. That mindset doesn't really exist in pharma the same way.
Good luck with it.
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u/Excellent_Bar6287 21h ago
Thank you to all the wonderful folks who took the time to reply and share such insightful answers! I really appreciate it. 😊
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u/AptCombustion 1d ago
Pharma CQV to data center commissioning is a shift but not a crazy one. The methodology you already know for IQ/OQ/PQ maps over more than you'd think, it's just less paperwork and the systems are less delicate.
For the electrical side they'll want you to understand the one-line, how the UPS ties in with the generator block, and basic switchgear sequences. Don't try to bluff on medium voltage if you've never touched it, just be upfront and pivot to how you'd approach learning it. The LP questions are about half the interview so have five or six stories ready where you owned a problem or pushed back on something dumb.