At a glance

Bring your curiosity to a team where deep immunoscience meets cutting-edge innovation. Across oncology, rare diseases, neurology, and vaccines, you’ll work at the intersection of lab science and AI-powered discovery — all while collaborating across boundaries to turn breakthrough ideas into real-world impact. Whether you want to deepen your scientific expertise or grow as a leader, you’ll find the opportunity here.

Job Title: Biosafety Testing Scientist

• Location: Vitry sur Seine, France

About the job

Are you ready to shape the future of medicine? The race is on to speed up drug discovery and development to find answers for patients and their families. Your skills could be critical in helping our teams accelerate progress. We are an innovative global healthcare company that helps the world stay ahead of infectious diseases by delivering more than 500 million vaccine doses a year. Across different countries, our talented teams are exploring new technologies to protect people and promote healthy communities. We chase the miracles of science every single day, pursuing progress to make a real impact on millions of patients around the world. Join the cell bank and drug substance manufacturing adventure in Sanofi Vitry E. Roux building, and participate to biologics and genomic medicine drug deliveries to patients. As Biosafety Testing Scientist in the Cell Banks and UPB GMP Testing team, you will guarantee our products are free from any microbial and viral contamination. You will also contribute to the genetic characterization of our products and to long term stability assessment of our cell banks. In this role, you will collaborate with multiple partners over the world, including CRO / CMOs (biosafety and genetic characterization assays are outsourced), quality, dossier/regulatory, or viral/microbial networks, from both R&D and M&S organizations.

Main responsibilities:

• Ensure the following up of analytical assays (detection of adventitious agents and cell line characterization) performed by subcontractors, in respect to project timelines and regulatory/quality standards
• Secure the activity with diversifying subcontractors and implementing new innovative analytical methods, in respect to regulatory updates
• Assess cell banks stability in the frequency defined and edit reports
• Edit GMP and quality documentation (Contracts, Specification sheet, Certificates of Analysis)
• Manage quality events (Deviations, CAPA, Change Controls and Quality Risk Assessment)​​​
• Ensure the compliance of the activity in compliance with Regulatory and Sanofi Standards
• Collaborate transversally with operations, process development, viral experts, Quality Assurance and purchasing department

About you

Experience:

• Experience in the fields of virology/viral safety in Industry or Academic Lab
• Experience in analytical laboratory
• Managing GxP activities is a plus

Soft and technical skills:

• Strong scientific knowledge in cell and molecular biology, virology and microbiology
• Strong organizational skills, meticulous, analytical mindset
• Agile to collaborate transversally, team spirit and customer-oriented

Education:

• PhD or Master in Biology/Biotechnology

Languages:

• Fluency in French & English: both languages are used in daily business

Why choose us?

• Bring the miracles of science to life alongside a supportive, future-focused team
• Discover endless opportunities to grow your talent and drive your career, whether it’s through a promotion or lateral move, at home or internationally
• Enjoy a thoughtful, well-crafted rewards package that recognizes your contribution and amplifies your impact
• Take good care of yourself and your family, with a wide range of health and wellbeing benefits including high-quality healthcare, prevention and wellness programs and at least 14 weeks’ gender-neutral parental leave