At Regeneron, we use science and innovation to develop life-changing medicines for people with serious diseases. We are seeking a talented Associate Scientist to join our Product Biochemistry group, supporting the characterization, modification, conjugation, purification, and binding analysis of critical reagents used across multiple therapeutic programs, in an on-site capacity. In this role, you will perform advanced characterization of biological reagents using biochemical, biophysical, and binding-based analytical techniques, including Biacore (SPR), to generate high-quality data that supports reagent program needs and lifecycle management, while collaborating with cross-functional teams to support project timelines and reagent-related deliverables.This position offers the opportunity to contribute to a fast-growing, science-driven organization making a meaningful difference to patients worldwide.When & where:Shift Requirements: Full-time, standard business hoursLocation: On-site in Tarrytown, NYFlexibility & travel: Minimal to no travel; on-site laboratory presence required to support experimental work and instrumentation needsWhat you'll do:Support the purification, characterization, modification, and conjugation of critical protein and biomolecule reagents using standard analytical methods and laboratory proceduresPerform advanced characterization of reagents to evaluate identity, purity, stability, aggregation, binding properties, and overall fitness for intended usePerform reagent labeling and modification activities to support assay development, method qualification, and reagent supply needsPerform binding characterization studies using Surface Plasmon Resonance (SPR) and other analytical platforms to evaluate molecular interactions and reagent performanceAccurately document laboratory activities, experimental procedures, and analytical results in the electronic laboratory notebook (ELN) following established proceduresCommunicate experimental findings and project updates to the supervisor and team members in a timely manner; summarize results in clear, concise reports and presentationsPresent findings at group meetings and contribute to scientific discussions and problem-solving effortsMaintain, troubleshoot, and support laboratory instrumentation necessary for reagent characterization and analytical testingThe environment and physical rhythms of this role:This is an on-site, hands-on laboratory role requiring the ability to work both independently and within a team on multiple projects simultaneouslyThe role includes contributing to lab equipment maintenance and safety practices to help maintain a safe, effective, and efficient working environmentLet's find out if we're a fit:Must-haves:BS/MS in Biochemistry, Biophysics, or a related field, with 0–3+ years of experienceInitiative and drive to complete meaningful tasks and learn new technologiesStrong organizational, communication, analytical, computer, and technical writing skillsExcellent oral and written communication skills and evidence of teamworkPreferred / nice-to-haves:Technical proficiency in automated FPLC and/or HPLC (SEC, IEX, affinity), electrophoresis (capillary or microchip, SDS-PAGE, western blots), spectroscopy, and light scatteringFundamental understanding of protein structure/function, protein-protein interaction, and general biochemistryExperience working in the biopharmaceutical industryThrive today. Grow tomorrow.Student Loan Paydown program & Tuition ReimbursementFamily Care BenefitsRelocation AssistanceInclusion, Culture and Well-Being programs (including physical & mental health)Does this sound like you? Apply now to take your first step towards living the Regeneron Way! We are committed to building a workplace with an inclusive culture. 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. 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 https://careers.regeneron.com/en/working-at-regeneron/total-rewards/. For other locations, additional information will be provided during the recruitment process. If you have any questions, please speak with your recruiter. Please be advised that at Regeneron, we believe we do our best work when we are together. For that reason, many roles are required to be performed on‑site. Please speak with your recruiter and hiring manager for more information about on‑site expectations for your role and location.As part of the recruitment process, certain background checks may be conducted in accordance with the laws of the country where the position is based. The purpose of such checks is to verify certain information prior to the commencement of employment such as identity, right to work and educational qualifications.For jobs in Canada: this posting is for an existing position.Salary Range (annually)$70,300.00 - $110,100.00