Senior Scientist - Biologics Potency, Cell Sciences, AR&D

Job Description

The Analytical Research & Development of our company Research Laboratories is seeking a highly motivated senior scientist to join the Biologics Potency team within the Cell-Based Sciences in Rahway, New Jersey. The qualified candidate will be responsible for potency bioassay development, method design and optimization, non‑GMP qualification and robustness, and method transfer to GxP testing laboratories to assess the biological activity of various biologics modalities such as therapeutic proteins, monoclonal antibodies, antibody‑drug conjugates, and/or complex modality‑based products.

• Develop and optimize immune binding assays and cell‑based assays for biologics development.
• Conduct non‑GMP qualification and robustness study to support assay validation.
• Support method transfers to internal and external GxP laboratories.
• Collaborate with cross‑functional teams to support biologics development.
• Maintain accurate and detailed laboratory records.
• Contribute to the preparation of regulatory submissions and technical reports.

Education

• Ph.D. in cell biology, immunology, biochemistry, molecular biology or a related field, OR
• M.S. in cell biology, immunology or a related field with a minimum of 5 years of relevant industry experience, OR
• B.S. in cell biology, immunology or a related field with a minimum of 8 years of relevant industry experience.

• Hands‑on experience with cell‑based assays.
• Strong written and verbal communication skills.
• Collaborative.
• Excellent problem‑solving skills and attention to detail.
• Ability to work independently and as part of a team.

• Hands‑on experience with immunoassays.
• Basic understanding of biological potency and assay development.

• Adaptability
• Analytical Method Development
• Antibody Drug Conjugates (ADC)
• Assay Development
• Bioanalytical Analysis
• Biochemical Assays
• Biochemistry
• Biological Sciences
• Cell‑Based Assays
• Chromatographic Techniques
• GMP Environments
• Immunoassays
• Immunochemistry
• Immunology
• Immunotherapy
• Innovative Thinking
• Microbiology
• Molecular Biology
• Monoclonal Antibodies
• Nuclear Magnetic Resonance (NMR) Analysis
• Polyclonal Antibody Production
• Process Analytical Technology (PAT)
• Strategic Thinking
• Technical Writing
• + 1 more

Current Employees apply

Current Contingent Workers apply

Our company is committed to inclusion, ensuring that candidates can engage in a hiring process that exhibits their true capabilities. Please  if you need an accommodation during the application or hiring process.

We will consider qualified applicants with arrest and conviction records for employment in compliance with the San Francisco Fair Chance Ordinance.

We will consider for employment all qualified applicants, including those with criminal histories, in a manner consistent with the requirements of applicable state and local laws, including the City of Los Angeles’ Fair Chance Initiative for Hiring Ordinance.

Merck & Co., Inc., Rahway, NJ, USA, also known as Merck Sharp & Dohme LLC, Rahway, NJ, USA, does not accept unsolicited assistance from search firms for employment opportunities. All CVs / resumes submitted by search firms to any employee at our company without a valid written search agreement in place for this position will be deemed the sole property of our company.

No fee will be paid in the event a candidate is hired by our company as a result of an agency referral where no pre‑existing agreement is in place. Where agency agreements are in place, introductions are position specific. Please, no phone calls or emails.

Regular

Domestic

No

No Travel Required

Not Applicable

Not Indicated

No

N/A

02/20/2026

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The salary range…