Principal Research Scientist I - Process Engineering
Posted Aug 10, 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
The posting asks for proven project leadership in drug product development. Tell me about leading a program where the process kept failing.
What they are checking: Whether they can lead persistently and methodically through a stubborn process problem, rather than guessing or giving up under pressure.
Tell me about a scale-up that went badly. What did you miss?
What they are checking: Whether they can be honest about scale-up failures and what they learned, since this discipline regularly produces difficult setbacks.
What part of drug product manufacturing do you think is most ready to change in the next few years?
What they are checking: Whether they think about the field beyond their current projects.
This is a Principal Research Scientist I seat in research and development process engineering at North Chicago, described as shaping the future of drug manufacturing. What would you want to know about the portfolio before joining?
What they are checking: That they ask what they would actually work on behind the recruiting language.
What would you do
How do you decide when a process is robust enough to transfer to manufacturing?
What they are checking: Whether they make sound judgments about process robustness before transfer, because a premature transfer is very expensive to fix.
How do you work with formulation scientists who want a process that is difficult to manufacture?
What they are checking: Whether they can manage the natural tension between formulation and manufacturability constructively, reaching a product that works at scale.
About the work
This role names direct compression, wet and dry granulation, hot melt extrusion, tableting and encapsulation. Which of those is hardest to scale from development to commercial, and why?
What they are checking: Whether they have real experience across the named drug product processes and understand the specific scale-up challenges each one presents.
Walk me through diagnosing a tableting problem that only appears at full scale.
What they are checking: Whether they can troubleshoot scale-dependent problems methodically, which is the core skill of a process engineer in drug product development.
When would you choose hot melt extrusion over a conventional approach for a poorly soluble compound?
What they are checking: Whether they can reason through formulation and process selection for poorly soluble compounds, choosing approaches based on the molecule's needs.
How do you design an experimental program when you have limited material and limited time?
What they are checking: Whether they design efficient experiments under limited material and time, showing real discipline in the design of experiments.
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Practice this out loudThe full job description
As published by AbbVie.