Senior Field Service Technician
Posted Sep 23, 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
Tell me about an installation and commissioning project you led on a customer site. What made it succeed or struggle?
What they are checking: Whether they have truly been the lead on site, managing schedule, budget and people, not just turning wrenches.
How would you train a customer's operators and maintenance staff so they can run the system after you leave?
What they are checking: Whether they can teach in both classroom and hands-on settings so customers become self-sufficient.
Jobs here can last up to four weeks on site. How do you handle extended travel?
What they are checking: Whether they have realistic experience with long trips, since the travel pattern does not suit everyone.
Tell me about a time you supported a customer or coworker remotely to fix a problem.
What they are checking: Whether they can guide someone else's hands over the phone with clear, step-by-step instructions.
What would you do
You are leading a customer's maintenance crew and outside contractors on a job. How do you keep everyone safe and on schedule?
What they are checking: Whether they can direct people who do not report to them while holding firm on safety.
The project is running behind and the customer is pushing to skip a commissioning test. What do you do?
What they are checking: Whether they protect quality and safety while managing customer pressure and keeping the relationship intact.
How do you handle project reporting and administration while you are busy in the field?
What they are checking: Whether they keep documentation current, since the posting makes reporting part of leading the job.
About the work
Walk me through how you would troubleshoot a variable displacement hydraulic pump that is not building pressure.
What they are checking: Whether they have real hydraulic diagnostic depth with pumps, relief valves and directional valves.
This equipment runs ultra-high pressure fluid systems up to 120,000 psi. How does that change the way you work?
What they are checking: Whether they respect the hazards of stored energy at extreme pressure and follow strict safe work practices.
What is your experience with RSLogix 5000 and ControlLogix? How would you use it to troubleshoot a machine fault?
What they are checking: Whether they can go online with a PLC, read logic and trace an input or output to find the fault.
How do you rebuild a centrifugal pump, and what do you check before putting it back in service?
What they are checking: Whether they know seals, bearings, impeller clearance and alignment well enough to do it right the first time.
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Practice this out loudThe full job description
As published by JBT Marel.