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Security Engineer
Posted Sep 28, 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 an ETL pipeline you built that pulled data from several systems. What went wrong and how did you fix it?
What they are checking: Whether they have hands-on pipeline experience and handle data quality problems instead of hiding them.
Describe a manual process you automated. How did you convince people to trust the new way?
What they are checking: Whether they can change how physical security staff work without breaking the processes they rely on.
This role requires a DOE Q clearance. What does holding a clearance mean to you in terms of daily habits?
What they are checking: Whether they understand the ongoing responsibilities and reporting that come with a clearance, not just passing the investigation.
What would you do
You find that the same door has three different names across DSX exports, field drawings and a spreadsheet. How do you settle on the right one?
What they are checking: Whether they can reconcile messy sources and set a naming standard that the field teams will actually use.
How would you prepare a Lenel import file for access levels and timezones so a bad row does not lock people out of a building?
What they are checking: Whether they think about testing, staging and rollback when a data mistake has real physical consequences.
How would you explain risk posture and asset readiness to security leadership who do not read SQL?
What they are checking: Whether they can turn technical data into a clear picture that helps leaders set priorities.
About the work
Walk me through how you would map DSX doors, readers and panels into Lenel OnGuard so the migrated system behaves the same way.
What they are checking: Whether they understand that access-control logic and hardware relationships must survive migration, not just the object names.
How would you use SQL to validate that a DSX to Lenel mapping is complete and correct before a cutover?
What they are checking: Whether they can design concrete checks that catch missing doors or wrong access levels before they become security gaps.
What would a Power BI dashboard for PACS modernization progress show, and who would it be for?
What they are checking: Whether they design dashboards around decisions leaders need to make rather than around whatever data is easy to show.
How do you treat access-control data differently from ordinary business data, given what it protects?
What they are checking: Whether they understand the sensitivity of badge, access level and door data at a site requiring a DOE Q clearance.
Where have you used C or Java alongside Python, and when would you pick one over the other for this kind of work?
What they are checking: Whether their programming range is real and whether they choose tools for good reasons.
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As published by Argonne National Laboratory.
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