Associate Scientist, Chemistry

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:

Rayze Bio is looking for an Associate Scientist to support in the development of novel therapeutics in preclinical stages. Candidates will work as part of a team of scientists to synthesize and design both small molecules and peptide analogs to optimize potency, pharmacokinetics, and in vivo efficacy of potential drug candidates. This position offers a challenging and rewarding work environment within a thriving company.

Essential duties and responsibilities include executing multi-step synthetic routes, optimizing reaction conditions, isolation, and characterization of organic compounds (chromatography, NMR, MS, IR spectroscopy).

• BS or MS in Chemistry or related field with strong understanding of organic and analytical chemistry.
• 1-5 years’ experience in an organic synthesis, chemistry, or analytical laboratory preferred.

• Strong synthetic skills and knowledge of lab techniques.
• Proficiency in compound synthesis techniques, compound purification, and characterization methods such as LCMS, HPLC and NMR.
• Familiarity with scientific software such as Chem Draw, Scifinder, and Reaxys.
• Adaptable and flexible, able to handle multiple demands and shifting priorities.
• Self-motivated with good interpersonal skills and ability to work effectively in a fast-paced, collaborative environment.
• Adept in documenting and presenting findings clearly through laboratory notebook, reports, and presentations.
• Expertise in synthetic organic chemistry, with experience synthesizing peptides a plus.

While performing the duties of this job, the employee is regularly required to sit, reach with hands and arms, and talk or hear. The employee must occasionally lift and/or move up to 5 pounds. Specific vision abilities required by this job include close vision and distance vision. This is a position that requires working in a laboratory environment, protective clothing, gloves, and safety glasses are required while working in a laboratory environment with radioactive materials.

The noise level in the work environment is usually moderate.

San Diego - Rayze Bio - CA: $95,505 - $115,730

The starting compensation range(s) for this role are listed above for a full-time employee (FTE) basis. Additional incentive cash and stock opportunities (based on eligibility) may be available. The starting pay rate takes into account characteristics of the job, such as required skills, where the job is performed, the employee’s work schedule, job‑related knowledge, and experience. Final, individual compensation will be decided based on demonstrated experience.

Eligibility for specific benefits listed on our careers site may vary based on the job and location. For more on benefits, please visit

Benefit offerings are subject to the terms and conditions of the applicable plans in effect at the time and may require enrollment. Our benefits include:

• Health Coverage: Medical, pharmacy, dental, and vision care.
• Wellbeing Support: Programs such as BMS Well-Being Account, BMS Living Life Better, and Employee Assistance Programs (EAP).
• Financial Well‑being and Protection: 401(k) plan, short- and long-term disability, life insurance, accident insurance, supplemental health insurance, business travel protection, personal liability protection, identity theft benefit, legal support, and survivor support.

Paid Time Off

• US Exempt Employees: flexible time off (unlimited,…