Skip to main content
Merck logo

Principal Scientist, Downstream Process Development

Merck
August 25, 2026
Full-time
Remote friendly (Rahway, NJ)
Worldwide
Operations
Role: Principal Scientist in Biologics Downstream Processing, focusing on designing and optimizing purification processes for biologics in early- and late-stage development. Responsibilities include advancing downstream processes through research and innovation, process characterization, regulatory filings, and process scalability. Collaboration spans research, manufacturing, academia, and vendors to develop next-generation biomanufacturing tech such as continuous and sustainable processes. Requirements: Ph.D. with 6+ years, or MS with 8+ or BS with 10+ years in Chemical/Biochemical engineering or related fields; expertise in biologics downstream processing, process development, CMC, and regulatory aspects. HighValue: biologics, process development, downstream purification, CMC, regulatory filings, early to late-stage clinical development. Additional preferred skills include leadership in CMC teams, biomanufacturing technologies, high-throughput experimentation, and data science. The role involves cross-functional teamwork, external representation at scientific forums, mentoring, and promoting a culture of safety and inclusion. Location: US-based, with 10% travel; remote/hybrid options not specified.