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Building Systems Control Technician
Posted Mar 9, 2026 · We last checked this listing on Oct 6, 2026
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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 time you made a change to a BAS program. How did you make sure it didn't break something else?
What they are checking: Caution and documentation when editing control logic in a complex, interconnected system.
How do you keep your skills current as control systems keep changing?
What they are checking: Commitment to ongoing self-study, which the posting lists as a responsibility.
What would you do
You get a BSL-3 room pressure alarm and a lab exhaust alarm at the same time. Which do you go to first and why?
What they are checking: Ability to prioritize alarms by risk to people and animals, the core of this role.
An animal housing room's temperature is drifting out of range overnight. What do you check?
What they are checking: Urgency and logic in protecting research animals whose studies depend on stable environments.
What do you do when a fire alarm comes in on the system?
What they are checking: Knowledge of fire system response procedures and coordination with safety and emergency teams.
The IT data center cooling alarm goes off on a weekend. Walk me through your response.
What they are checking: Quick action and clear escalation to protect critical systems when staffing is thin.
About the work
Walk me through how you'd troubleshoot a VAV box that won't hold its setpoint.
What they are checking: Hands-on controls troubleshooting, from sensor and actuator checks to the DDC programming.
How do you calibrate a pneumatic controller, and how is that different from a digital one?
What they are checking: Experience with both pneumatic and direct digital controls, which the posting requires.
How would you use trend logs to find a recurring problem that never shows up when you're there?
What they are checking: Skill using BAS data to diagnose intermittent issues, which the posting names directly.
How do you read a ladder logic diagram, and when have you modified one?
What they are checking: Familiarity with PLC logic, which the role uses alongside building controllers.
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Practice this out loudThe full job description
As published by Medical College of Wisconsin.