Staff External Manufacturing Specialist (Clinical Drug Product)

Build our future together: We are currently looking to fill a Staff External Manufacturing Specialist as the technical and operational authority for clinical contract drug product (DP) filling operations at CMO and business partner sites. Owns the tech transfer process end-to-end, drives active batch management from pre-production through lot disposition, and is a key GMP decision-maker. Provides technical mentorship and leadership to mid-level specialists, and collaborates with management on compliance strategy and CMO performance in the clinical operations space. When & where: Rensselaer, NY Monday-Friday Discover your role: Drug Product Filling – Technical Expertise Apply deep technical knowledge of aseptic filling unit operations: sterile filtration (bioburden reduction and sterilizing-grade filters), filling (time-pressure, peristaltic, rotary piston), stoppering, capping, and lyophilization cycle development and scale-up. Interpret environmental monitoring (EM) data, airborne particulate results, and media fill (APS) outcomes; assess implications for batch disposition and process adequacy. Partner with DP MSAT to evaluate and apply lessons learned across the network as it relates to CCI, APS, filling operations, CMO assessments, etc. Assess cleanroom design and equipment suitability (ISO 5/Grade A filling zones, Grade B/C support areas) relative to product contamination control requirements. Support extractables and leachables (E&L) risk assessments for product-contact materials and container closure system selection. Technical Transfer: Own and lead end-to-end operations of tech transfer to CMO filling sites, gap assessments, risk evaluations and assessments, facility/equipment readiness, engineering run execution. Approve Technical requirements document (TRD), Master Batch Records (MBR), validation reports, summary reports, etc Oversee tech transfer, qualification, and validation of filling lines and critical equipment: isolator/RABS, vial/syringe filling systems, lyophilizers, and component prep (depyrogenation tunnels, washers, autoclave). Coordinates/oversees DP manufacturing at CMO as dictated by project tech transfer and clinical operations. Liaises between various departments within Regeneron including, but not limited to Quality Control, Quality Assurance, Supply Chain, Operations/Logistics Departments, Legal, Regulatory, Strategic Sourcing and contract manufacturers or business partners. Technical Mentorship & Leadership Serve as the primary technical resource for mid-level EM Specialists; provide hands-on guidance on aseptic filling operations, batch record review, deviation management, and CMO oversight. Coach Specialists on interpreting in-process data, applying GMP regulations to real-world filling scenarios, and escalating issues appropriately. Lead sub-teams on continuous improvement initiatives, filling technology upgrades, and CMO performance management. Collaborate with management to communicate CMO operational status, proactively, surface risks, and shape external manufacturing strategy. Active Batch Management: Serve as Regeneron’s primary technical contact for all active clinical batches at CMO sites — track filling status, in-process results, and lot disposition milestones in real time. Monitor in-process data: fill weight/volume checks, filter integrity test results, visual/automated inspection outcomes, and lyophilization cycle data. Lead deviation investigations and drive CAPA closure for events occurring during or after filling operations; assess impact on batch and filing. Track cycle times, yield trends, and reject rates across batches; analyze data for process drift and drive continuous improvement actions with the CMO. Lead sub-teams in continuous process improvements, system/equipment implementation and/or strategy development. Ensures product integrity and company reputation monitoring of cGMP compliance at external manufacturing contract manufacturers and business partners. Regulatory & GMP Compliance Key GMP decision-maker for external DP filling operations; apply FDA 21 CFR, EU GMP Annex 1, and USP/EP/JP compendia requirements. Ensure CMO change controls are appropriately evaluated for regulatory impact; coordinate post-approval change strategies with Regulatory Affairs. Review CMC sections of regulatory submissions (IND, BLA/NDA, MAA) related to DP manufacturing and filling as required. Support GMP audits of CMO sites; identify compliance gaps, assess risk This role requires: A Bachelor’s degree or advanced degree in Pharmaceutical Sciences, Chemical Engineering, Chemistry, Biochemistry, or related discipline and 10+ years in pharmaceutical/biopharmaceutical DP manufacturing, with significant direct experience in sterile filling and CMO oversight. Hands-on technical experience with sterile drug product filling operations (aseptic filling, lyophilization, CCI, inspection) in a GMP environment. Demonstrated experience leading or executing tech transfer of DP filling processes to CMO sites, including MBR/TRD approval, PPQ, and process validation. Experience leading deviation investigations and CAPA development for sterile filling operations. Demonstrated ability to mentor and develop technical staff; experience providing guidance in a team or lead capacity. Strong analytical, communication, and cross-functional collaboration skills; ability to influence and make decisions in ambiguous situations. Willingness to travel domestically and internationally up to 25%+ as required. May substitute proven experience for education requirement. Does this sound like you? Apply now to take your first step towards living the Regeneron Way! We have an inclusive culture that provides comprehensive benefits, which vary by location. In the U.S., benefits may include health and wellness programs (including medical, dental, vision, life, and disability insurance), fitness centers, 401(k) company match, family support benefits, equity awards, annual bonuses, paid time off, and paid leaves (e.g., military and parental leave) for eligible employees at all levels! For additional information about Regeneron benefits in the US, please visit For other countries’ specific benefits, please speak to your recruiter. Please be advised that at Regeneron, we believe we are most successful and work best when we are together. For that reason, many of Regeneron’s roles are required to be performed on-site. Please speak with your recruiter and hiring manager for more information about Regeneron’s on-site policy and expectations for your role and your location. 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, nationality, national or ethnic origin, civil status, age, citizenship status, membership of the Traveler community, sexual orientation, disability, genetic information, familial status, marital or registered civil partnership status, pregnancy or parental status, gender identity, gender reassignment, military or veteran status, or any other protected characteristic in accordance with applicable laws and regulations. The Company will also provide reasonable accommodation to the known disabilities or chronic illnesses of an otherwise qualified applicant for employment, unless the accommodation would impose undue hardship on the operation of the Company's business. For roles in which the hired candidate will be working in the U.S., the salary ranges provided are shown in accordance with U.S. law and apply to U.S.-based positions. For roles which will be based in Japan and/or Canada, the salary ranges are shown in accordance with the applicable local law and currency. If you are outside the U.S, Japan or Canada, please speak with your recruiter about salaries and benefits in your location. Please note that certain background checks will form part of the recruitment process. Background checks will be conducted in accordance with the law of the country where the position is based, including the type of background checks conducted. The purpose of carrying out such checks is for Regeneron to verify certain information regarding a candidate prior to the commencement of employment such as identity, right to work, educational qualifications etc. Salary Range (annually) $108,000.00 - $176,000.00 Regeneron is a leading biotechnology company that invents life-transforming medicines for people with serious diseases. Founded and led for over 30 years by physician-scientists, our unique ability to repeatedly and consistently translate science into medicine has led to nine FDA-approved treatments and numerous product candidates in development, almost all of which were homegrown in our laboratories. Our medicines and pipeline are designed to help patients with eye diseases, allergic and inflammatory diseases, cancer, cardiovascular and metabolic diseases, neurology, infectious diseases and rare diseases. Regeneron is also proud of award winning culture of innovation, being recognized as a Great Place to Work in 2021, Fast Company’s Best Workplace for Innovators in 2020, and Forbes JUST companies in 2020, among others.