Senior Mechanical Design Engineer
Posted Aug 31, 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 project where you took a set of specs and pricing notes from sales and had to turn that into a full mechanical design. How did you handle the gray areas?
What they are checking: whether they can translate ambiguous commercial input into engineering scope without constant hand-holding
Tell me about a time your design schedule was at risk because parts or research took longer than expected. What did you do?
What they are checking: ability to manage schedule pressure and material lead times against a fixed production build date
Tell me about a time you disagreed with an electrical engineer over switchgear or cabling layout. How did you resolve it?
What they are checking: cross-discipline collaboration skill and whether they can hold ground respectfully
Tell me about a time you had to explain a technical design decision to someone without an engineering background, whether that was sales, production, or a customer.
What they are checking: communication skill across all levels, which the posting explicitly calls out
What would you do
Say a shop write-up you're reviewing has the production sequence out of order and it would create a rework loop. What do you do next?
What they are checking: practical shop-floor judgment and whether they understand fabrication flow, not just CAD
A customer's expectations don't quite match what the sales write-up describes, and you catch it midway through design. What's your move?
What they are checking: proactive communication and willingness to flag problems before they become costly
You're training a junior design engineer who keeps making the same mistake in their drawings. How do you handle that?
What they are checking: mentoring approach and patience, since the role includes supervising and training others
About the work
How do you approach checking someone else's drawing package before it goes to production? What are you actually looking for line by line?
What they are checking: rigor and specificity in design review, since this role reviews other engineers' work
Describe your experience building complex 3D models and full 2D drawing sets in SolidWorks or Creo. What's the most complicated assembly you've modeled?
What they are checking: depth of hands-on CAD skill versus surface familiarity
What do you know about diesel and natural gas engine-generator sets, and where has that knowledge actually shown up in a design decision you made?
What they are checking: real industry depth versus generic mechanical engineering background
What's your experience with sheet metal design, weld processes like MIG, TIG, or stick, and structural or wind load calculations?
What they are checking: whether the stated preferred qualifications are real strengths or just resume keywords
Have you supported NRTL certification testing, like UL, Intertek, or TÜV? Walk me through what that involved.
What they are checking: exposure to compliance testing that affects design decisions and documentation
Have you worked with a PLM system like Arena or Windchill, or been involved in transferring a new product to a new supplier? What went wrong and what went right?
What they are checking: experience with product lifecycle management and new product introduction realities
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Practice this out loudThe full job description
As published by Generac.