Associate Principal Scientist, Downstream Process Development
Merck
September 11, 2026
Full-time
Remote friendly (Rahway, NJ)
Worldwide
Operations
Role: Associate Principal Scientist in Downstream Process Development within biopharmaceutical biologics. Primary objectives include leading the design, optimization, and transfer of scalable downstream purification processes for early and late-stage biologics, supporting CMC development and pipeline progression. Responsibilities encompass independently conducting experiments on unit operations such as chromatography, filtration, viral clearance, and continuous processing; collaborating cross-functionally with upstream, analytical, manufacturing, and external partners; advancing process technology strategies and innovation; and mentoring junior scientists. Qualifications: Ph.D. with 3+ years or Masterβs with 6+ years industry experience in Biochemical or Chemical Engineering. Skills: proven accomplishments in downstream process development, expertise in recombinant protein purification, and ability to work within GxP environments. Preferred skills include experience with automation platforms, continuous processing, data science approaches, and process control systems. High-value biopharma specifics: biologics, bioprocess engineering, CMC development, early and late-stage pipeline support, process transfer to manufacturing, and external collaboration. Travel: approximately 10%, with a hybrid work setup available.