Senior Bioassay Scientist - Cell Biology & Analytics

Sanofi; Framingham (MA); On-site; USD 101,000 - 145,000; Full time

Job summary

Sanofi is seeking a Senior Scientist in Bioassay Development in Framingham, MA. You will lead analytical method development for potency assays, engineering cell lines and collaborating across biology, chemistry and quality teams.

You’ll mentor junior scientists, contribute to publications, and work in a GMP‑regulated environment as part of a dynamic, AI‑powered biopharma unit advancing immunoscience to patients.

Qualifications

• PhD in life sciences with at least 1 year of relevant research experience (academic work considered).
• Or a Master’s degree with at least 4 years of relevant experience.
• Experience in mammalian cell culture and engineering cell lines or transgenic models.
• Extensive experience in at least two of qPCR, Western blotting, and plate-based assays (ELISA/fluorescence).
• Strong time management and excellent scientific communication skills.

Responsibilities

• Initiate, design, direct and execute analytical experiments to develop/qualify relative potency methods.
• Engineer novel cell lines to evaluate mechanisms of action.
• Support mAb and bi/tri-specific development and other modalities.
• Maintain good documentation in electronic lab notebook system.
• Maintain GMP compliance and assist SOP drafting and routine lab maintenance.
• Collaborate with cross-functional teams across science, quality and operations.
• Lead and contribute to high-profile presentations/publications.
• Mentor interns and junior scientists; foster collaborative environment.
• Collaborate with CROs/CDMOs for training and testing.

Skills

Mammalian cell culture

Molecular biology techniques

qPCR

Western blotting

ELISA / plate-based assays

Scientific communication

Education

PhD in Molecular Biology/Cell Biology/Biochemistry/Biotechnology/Immunology/Microbiology/Life Sciences

Master's degree with 4+ years of experience

Tools

SnapGene

Softmax

Luminometer

Job description

Sanofi is seeking a Senior Scientist in Bioassay Development in Framingham, MA. You will lead analytical method development for potency assays, engineering cell lines and collaborating across biology, chemistry and quality teams.

You’ll mentor junior scientists, contribute to publications, and work in a GMP‑regulated environment as part of a dynamic, AI‑powered biopharma unit advancing immunoscience to patients.