Principal Scientist I, Biologics Drug Product Development
Posted Sep 28, 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 tech transfer to an external manufacturing site that you led. What risks did you manage?
What they are checking: Whether they have real scale-up and transfer experience with third-party manufacturers.
Describe a time you had to tell line management that a development plan was at risk.
What they are checking: Whether they communicate risks early with clear mitigation plans, as the posting asks.
Tell me about a time you worked closely with analytical or bioprocess colleagues to solve a drug product problem.
What they are checking: Whether they collaborate across the many groups this role depends on.
What would you do
A stability study shows unexpected subvisible particles at the six-month point. How do you approach it?
What they are checking: Whether they investigate root causes across formulation, container and process before reacting.
The device team wants a different syringe that would require a new formulation study. How do you handle it on the CMC team?
What they are checking: Whether they can weigh cross-functional changes on timeline, risk and patient benefit.
About the work
Walk me through how you develop a formulation for a high-concentration subcutaneous antibody.
What they are checking: Whether they understand viscosity, stability and excipient tradeoffs for patient-friendly dosing.
How does the choice of product presentation, such as a vial, prefilled syringe or autoinjector, affect your formulation and process work?
What they are checking: Whether they connect formulation to device decisions, which matters for the PPDST role.
What formulation and process challenges come with genetic medicines like AAV or LNPs compared with antibodies?
What they are checking: Whether they can extend drug product thinking to the newer modalities in this organization.
How do you design fill-finish process studies to make sure shear, freeze-thaw and hold times will not harm the product?
What they are checking: Whether they know which process stresses matter for biologics and how to characterize them.
How do you use design of experiments in formulation development?
What they are checking: Whether they run efficient, structured studies rather than testing one factor at a time.
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Practice this out loudThe full job description
As published by AbbVie.