Senior Mechanical Engineer - Reliability & Maintainability
Posted Aug 20, 2026 · We last checked this listing on Oct 6, 2026
Likely interview questions for this role
Written from this job description, not a generic list. Each one notes what the interviewer is really checking.
About your past
Walk me through a time you took a field failure on a generator or similar equipment and traced it back to a root cause. What tools did you use and what did you change in the design?
What they are checking: whether the candidate has real RCA experience and can connect field data to engineering action, not just theory
Give me an example where you had to push back on a design decision because it hurt maintainability or reliability, even though it helped cost or schedule. How did that conversation go?
What they are checking: ability to advocate for reliability under commercial pressure and how they handle friction with other functions
Tell me about a diagnostic or service manual you contributed to or led. What made it usable for a technician who's never seen the product before?
What they are checking: real experience producing technical documentation that works for end users, not just internal engineering notes
Describe a Critical Design Review or Serviceability Review where your input actually changed the outcome. What did you flag and how did you make the case?
What they are checking: ability to influence design decisions in a formal review setting, not just attend meetings
Tell me about a project where you were mentoring or guiding a less experienced engineer while also carrying your own workload. How did you balance that?
What they are checking: readiness for the senior-level mentorship expectation on top of individual technical output
What would you do
Say a genset in the field is showing a much higher than expected MTTR because technicians can't easily access a failing part. How would you approach fixing that, and who would you need in the room?
What they are checking: practical grasp of serviceability design and the cross-functional collaboration needed to fix it
If Tech Support hands you a cluster of field complaints on a product with no clear pattern yet, what's your first move to start narrowing down the cause?
What they are checking: structured troubleshooting instinct versus guesswork when the data is messy
Imagine sourcing wants to swap in a cheaper component and your analysis says it will hurt reliability. Quality and program management want to move forward anyway. What do you do?
What they are checking: how they navigate conflicting priorities between cost, schedule, and reliability without just capitulating or digging in stubbornly
About the work
Tell me about a DFMEA you ran on a product. What failure modes surfaced that weren't obvious at first, and how did that change the design or the maintenance plan?
What they are checking: depth of hands-on FMEA experience versus box-checking familiarity
What's the difference between designing for MTBF improvement and designing for MTTR improvement, and can you give an example of a change that improved one but hurt the other?
What they are checking: whether they actually understand the tradeoffs between reliability and repairability rather than reciting acronyms
How have you used SolidWorks or Creo to actually drive a reliability fix, not just to update a drawing after the fact?
What they are checking: whether CAD skill is tied to engineering judgment or just drafting
How do you use bills of materials and ERP data, like in SAP, when you're trying to figure out serviceability or supportability issues on an existing product?
What they are checking: practical fluency with the systems that connect engineering decisions to real supply and service constraints
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Practice this out loudThe full job description
As published by Generac.