Sr Design Engineer, Motors
Posted Mar 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
Tell me about a motor or electromechanical project you led. What was the hardest technical call?
What they are checking: Senior ownership and how they make hard technical decisions.
Tell me about a time you had to explain a motor tradeoff to a product manager.
What they are checking: Communicating technical limits in terms of user value and cost.
How do you keep up with motor technology like new magnet materials or topologies?
What they are checking: Ongoing learning to support leadership in motor capability.
What would you do
How would you work with electrical engineers on motor control without the two sides blaming each other when performance falls short?
What they are checking: Collaborating across mechanical and electrical disciplines, which the posting describes as the team's mix.
A motor passes lab life testing but fails early in field tools. How do you investigate?
What they are checking: Connecting field conditions like dust, impact and duty cycle to lab gaps.
About the work
Walk me through how you would design a brushless motor for a high-torque cordless tool.
What they are checking: Real motor design skill across magnetics, windings, thermal limits and packaging.
How do you balance power density against heat in a small motor that sits inside a tool housing?
What they are checking: Thermal management thinking in tight spaces with limited airflow.
What mechanical failure modes worry you most in a power tool motor, and how do you design against them?
What they are checking: Awareness of bearing, rotor retention, magnet and fan failures in harsh use.
What analysis tools do you use for motor design, and how do you know when to trust the simulation?
What they are checking: Using electromagnetic and thermal simulation with correlation to test data.
How do you design a motor so it can be built consistently at high volume?
What they are checking: Design for manufacturing in winding, magnet insertion and balancing.
How would you test a motor's durability under the dust and debris a jobsite produces?
What they are checking: Designing tests for contamination that kills motors in real use.
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As published by Milwaukee Tool.