Regeneron Pharmaceutical's Analytical and Biological Mass Spectrometry Group (ABMS), located in Tarrytown, NY, is seeking a highly motivated Sr. Scientist. In this role, you will work in an innovative mass spectrometry (MS) lab and develop LC-MS methods for characterizing biotherapeutic products to support all stages of drug development, from early-stage candidate selections to late-stage regulatory submissions. You will conduct and develop innovative technologies to support a diverse Regeneron's R&D pipeline.

**A Typical Day in the Role Might Look Like:**

+ Design, execute, and clearly communicate analytical characterization for biotherapeutics, including adeno-associated virus (AAV), monoclonal and bispecific antibodies, Fc-fusion proteins, and other modalities, to support drug development.

+ Lead and execute characterization activities to evaluate and elucidate critical quality attributes such as charge variants, size variants, and post-translational modif...