Principal Scientist, Radiopharmaceutical Development​/CMC

At Rayze Bio, every day is an opportunity to ignite meaningful change. As a wholly‑owned subsidiary of Bristol Myers Squibb, Rayze Bio blends the nimble, pioneering spirit of an emergent biotech with the global expertise and resources of a leading innovator in oncology. Our mission is to develop transformative radiopharmaceutical therapies that offer new hope for patients living with cancer. Here, you’ll join a multidisciplinary team where your ideas are valued, your expertise is amplified, and collaboration is at the heart of everything we do.

From day one, expect to make an immediate impact—on our science, on our teams, and most importantly, on patients.

Learn more about Rayze Bio:

The Principal Scientist, Radiopharmaceutical Development/CMC will play a key role in driving pre‑clinical, early‑ and late‑stage development and lifecycle management of radiopharmaceuticals for clinical use. As a scientific and technical leader, this individual will be instrumental in advancing Rayze Bio's innovative drug products from bench to clinic and beyond.

The Principal Scientist will provide leadership across multiple stages of drug development — including formulation development and optimization, IND‑enabling studies, and scale‑up and automation development — while collaborating cross‑functionally with discovery, pharmacology, CMC, toxicology, and clinical teams to accelerate novel therapeutics toward patients in need.

Essential duties and responsibilities include the following. Other duties may be assigned.

• Provide scientific and technical leadership across Rayze Bio's drug product development platform, driving end‑to‑end process development, scale‑up, and the translation of novel processes into robust, repeatable GMP manufacturing operations.
• Lead, design, plan, and execute scientific experiments supporting the development, scale‑up, and automation of radiopharmaceutical drug product and API manufacturing processes.
• Drive the technology transfer of drug products and APIs from preclinical through clinical manufacturing stages, ensuring seamless transitions and sustained process continuity.
• Partner with Engineering and Operations to define user requirements and technical specifications, influence equipment design and selection for drug product manufacturing.
• Investigate manufacturing gaps and deviations through rigorous root cause analysis, leading the development and execution of corrective actions and continuous process improvement initiatives.
• Author technical reports, development summaries, and source documents to support regulatory filings, including CMC sections for IND and NDA submissions to the FDA, as well as filings for international regulatory jurisdictions (e.g., EMA, Health Canada).
• Collaborate cross‑functionally with Regulatory, Quality, Supply Chain, Clinical, and R & D teams to ensure scientific and operational alignment with program milestones and corporate objectives.
• Mentor and develop junior scientists, fostering a culture of scientific excellence, continuous learning, and operational rigor.
• Support commercialization activities for radiopharmaceutical products, contributing to the successful transition from clinical to commercial‑scale manufacturing.
• Travel up to 20% as required to support program needs and site activities.

• Ph.D., M.S., or B.S. in Chemistry, Chemical Engineering, Pharmaceutical Sciences, or a related field, with requisite industry experience.
• 8+ years of experience in drug development, manufacturing, CMC or related fields in a pharmaceutical industry, preferably radiopharmaceuticals.
• Demonstrated experience in radiopharmaceutical formulation development, process development, and GMP manufacturing.
• Proven track record of leading and executing IND‑enabling studies and supporting regulatory submissions (IND, NDA, or equivalent).
• Experience with technology transfer from preclinical to clinical manufacturing environments.
• Working knowledge of GMP regulations (FDA, EMA, ICH guidelines) and NRC regulatory requirements.
• Experience working in hot cell environments and with automated synthesis platforms is highly desirable.