Sr. Associate Scientist, R&D Chemistry, Peptidomimetic Purification

Sr. Associate Scientist (Peptidomimetic Purification), R&D Chemistry

We are currently seeking a lab-centric peptide purification chemist to join the R&D (Research & Development) Chemistry group. In this position, they will play a key role in Regeneron’s peptidomimetic antibody-conjugate drug discovery capabilities to enable seamless combination with the company’s existing expertise in biologics and novel genetic medicines. The candidate will drive the purification of peptidomimetic payloads and linker payloads for antibody conjugate drug therapeutics across diverse research areas.

Cultural fit with the Regeneron cross‑functional teams will be a key driver for success. The R&D Chemistry team is primarily composed of synthetic organic, medicinal chemistry and bioconjugation scientists that work in a highly collaborative environment with other technology, biology and therapeutic area groups.

• Act actively in the day‑to‑day activities of the R&D Chemistry Peptidomimetic purification team.
• Perform mass‑triggered HPLC purification of novel peptidomimetic drug modalities, using modern purification instrumentation/detection and techniques.
• Troubleshoot and optimize peptide purification methods and enable high‑throughput purification and isolation.
• Identify new strategies and technologies for peptidomimetic purification to improve on existing Regeneron techniques.
• Actively participate in departmental, cross‑functional, leadership, and external meetings to contribute expertise and to represent the vision of the R&D Chemistry Peptidomimetic purification team.
• Interact broadly and collaboratively with other Regeneron groups, forging relationships and active collaborations.

• Bachelor’s degree required, Master’s degree preferred in peptide, peptidomimetic, small molecule purification.
• Minimum of 5 years of industry experience.
• Extensive hands‑on experience of the HPLC purification/detection and method troubleshooting of peptidomimetics.
• Hands‑on experience with Waters and/or Agilent purification systems preferred.
• Hands‑on experience with mass‑triggered collection preferred.
• Extensive experience running modern purification/isolation equipment and instrumentation.
• A track record of success in the field of either peptidomimetics or small molecules purification is required.
• Working collaboratively with both internal and external organizations (e.g., CROs) is essential.

Regeneron offers a competitive and comprehensive total rewards package which may include, depending on country and role: annual bonuses or other incentive plans, equity awards, pension or retirement benefits, 401(k) company match, health and wellness programs, fitness centers, insurance benefits (e.g. medical, dental, vision, life and disability), paid time off, and family support benefits. For additional information about Regeneron benefits in the U.S., please visit  For other locations, additional information will be provided during the recruitment process.

Regeneron is an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion or belief (or lack thereof), sex, sexual orientation, gender identity or expression, gender reassignment, marital or civil partnership status, civil status, pregnancy or parental status, age, disability, nationality, citizenship status, ethnic or national origin, membership of the Traveler community, familial status, genetic information, military or veteran status, or any other characteristic protected under applicable law.

Where required, we will provide reasonable accommodation to applicants with known disabilities or chronic illnesses during the recruitment process, unless such accommodation would impose undue hardship. Where necessary, we disclose salary ranges for roles in all countries in which we operate. The final offer will be determined within the relevant range based on the country of employment, specific role level, and your skills and experience.

In some countries, collective bargaining agreements (CBAs) may apply and influence certain elements of pay or benefits.