Senior Associate Scientist, Pharmacology

Life at BMS

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:

This laboratory‑based role offers an exciting opportunity to advance novel radiopharmaceutical therapies from bench to bedside. The Associate Scientist will participate in discovery research by conducting in vivo experiments and managing vivarium duties, including experiment design, execution, tissue collection, and data analysis. The role also includes cross‑functional collaboration with teams in translational research, medicinal chemistry, and other scientific disciplines. The successful candidate will receive mentorship from senior scientists and must adhere strictly to radiation safety protocols.

• Design and execute in vivo studies using CDX, PDX, and syngeneic mouse models to evaluate tumor growth kinetics, biodistribution, therapeutic efficacy, and durability of response across various treatment modalities, including radiopharmaceutical agents.
• Perform essential in vivo procedures: cell culture, tumor cell and PDX fragment implantation, sampling, dosing (IV, SC, IP, PO), tumor and body weight monitoring, and necropsy.
• Analyze and interpret experimental data independently; present findings at project team meetings, departmental reviews, and company‑wide forums.
• Work with radioactive materials in strict compliance with institutional and federal radiation safety protocols.
• Support laboratory operations, including inventory management, equipment maintenance, and ensure strict compliance with company policies, GLP, IACUC, and animal welfare guidelines, including accurate documentation in laboratory notebooks and electronic records.
• Collaborate effectively within the immediate team and cross‑functionally to advance program objectives.
• Demonstrate initiative and technical expertise in troubleshooting experimental issues and ensuring accurate data analysis.
• May involve working outside standard business hours, including weekends, holidays, and early mornings, to support critical in vivo studies and project deadlines.

• B.Sc. with 3-4+ years of experience or M.Sc. with 1-2+ years of experience in Biology, Pharmacology, Translational Research, Molecular Biology, or a related discipline.
• Prior hands‑on experience in pre‑clinical drug discovery programs (industrial or academic settings) is strongly preferred.
• Prior experience working with radioactive materials is preferred.
• Prior experience culturing and expanding cancerous cell lines is a plus.

• Technical proficiency in rodent handling (immune-compromised and
  -competent mice), aseptic procedures, and lab animal research.
• Ability to perform IV compound administration and SC engraftment is mandatory.
• Working knowledge of MS 365 and Graph Pad Prism.
• Strong work ethic, self‑motivation, adaptability, and organizational skills.
• Ability to work in a fast‑paced, dynamic, and collaborative environment.
• Excellent written, oral communication, and presentation skills.
• Experience with in vivo imaging modalities is a plus.
• Familiarity with the drug development process and…