Senior Scientist I, Mechanical Engineering
Posted Aug 25, 2026 · We last checked this listing on Oct 2, 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
The posting names pump manifolds, vision systems, high-precision stages and optomechanics. Which of those are you strongest in, and which would you be learning here?
What they are checking: Honest self-assessment against the specific subsystems named.
Tell me about a time you had to choose between a design that was elegant and one that could actually be built and serviced. What decided it?
What they are checking: Practical engineering judgment over preference.
This is in Madison, Wisconsin, not North Chicago, and it sits inside discovery rather than manufacturing. What do you want to know about the team size and how many instruments you would own at once?
What they are checking: Attention to the site and the real workload before committing.
What would you do
How do you work with a software team when the mechanical behavior and the control code have to be developed at the same time?
What they are checking: Cross-discipline development, which the posting makes a stated partnership.
An instrument works in prototyping and then fails intermittently in operations. Walk me through how you chase that down.
What they are checking: Diagnostic method on the intermittent failure this posting explicitly lists.
Scientists will use what you build. How do you find out what they actually need when what they ask for is usually a solution rather than a problem?
What they are checking: Requirements gathering from internal researchers.
About the work
This team builds instrumentation for peptide discovery in Madison. Walk me through a mechanical design you took from concept to a working instrument. What was the hardest subsystem?
What they are checking: Real instrument development experience rather than component design.
Tell me about a tolerance stack-up that bit you late in a build. How did you catch it, and what changed in how you work?
What they are checking: Precision design discipline learned from an actual failure.
How do you design for maintenance and cleaning on an instrument that handles chemistry?
What they are checking: Whether they design for the whole life of the instrument, not just first assembly.
What kind of analysis do you run before you commit to a design, and where do you decide analysis has diminishing returns?
What they are checking: Balance between modeling and building, which matters in a small instrumentation team.
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Practice this out loudThe full job description
As published by AbbVie.