Jobs › Argonne National Laboratory
Maintenance Mechanic
Posted Aug 12, 2026 · We last checked this listing on Oct 4, 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
How do you keep a good attendance record, and how do you handle it when something comes up?
What they are checking: Whether they are reliable, since the posting calls out attendance directly.
Tell me about a time you learned a new skill on the job from a more experienced coworker.
What they are checking: Whether they are coachable and eager to grow toward journeyman level.
Tell me about a time you made a mistake on a repair and how you handled it.
What they are checking: Whether they are honest about errors and report them, which matters for safety and quality.
What would you do
You're assisting a journeyman mechanic and think a step they're taking is unsafe. What do you do?
What they are checking: Whether they will speak up about safety even when they are the less experienced person.
What would you do if you were asked to do a repair you had never done before?
What they are checking: Whether they ask for help and follow procedure instead of guessing on unfamiliar work.
Working at a national lab can mean security rules and restricted areas. How do you feel about following strict procedures?
What they are checking: Whether they are comfortable working within safeguards and security rules in a research facility.
About the work
Walk me through a preventive maintenance task you've done on an HVAC system.
What they are checking: Whether they have real hands-on PM experience with building systems.
How do you follow lockout/tagout before working on electrical or mechanical equipment?
What they are checking: Whether safe energy control is a habit for them, which matters greatly under Argonne's ESHQ rules.
Tell me about a plumbing repair you've done and how you found the problem.
What they are checking: Their practical plumbing skills and their approach to finding the cause of a problem.
How would you check that an air handling unit is working properly during a routine round?
What they are checking: Whether they know what normal looks like so they can spot problems early.
Practice this interview out loud.
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Practice this out loudThe full job description
As published by Argonne National Laboratory.