External Manufacturing Specialist; 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.

• Rensselaer, NY
• Monday-Friday

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.

• 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 (M ), 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.

• 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.

• 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,…