_Le contenu du poste est libellé en anglais car il nécessite de nombreuses interactions avec nos filiales à l’international, l'anglais étant la langue de travail._ _This job offer is accessible to all, regardless of gender._   **Job title:** _Principal Scientist - Commercial Cell Culture Development_ + _Location: Vitry-sur-Seine_ **_About the job_** As **Principal Scientist - Commercial Cell Culture Development** within our Cell Culture Development (CCD) team, you'll lead the development of innovative cell culture processes for our late-stage biological products. Ready to get started? Based in Vitry-sur-Seine, you will be a scientific leader within the Commercial Cell Culture Development department, working in a dynamic and collaborative environment. You'll directly contribute to the development of innovative processes that support the commercialization of Sanofi's biological products. **About Sanofi:** We're an R&D-driven, AI-powered biopharma company committed to improving people's lives and delivering compelling growth. Our deep understanding of the immune system – and innovative pipeline – enables us to invent medicines and vaccines that treat and protect millions of people around the world. Together, we chase the miracles of science to improve people's lives. **Main responsibilities:** + Drive development of robust fed-batch and perfusion cell culture processes for commercial manufacturing + Lead and mentor a team of upstream process development technicians + Design innovative strategies for media development and cell metabolism optimization + Manage successful process scale-up and transfer to manufacturing sites + Author upstream sections for regulatory submissions (IND/BLA) and address agency questions + Build strong partnerships within the global Cell Culture Development network **_About you_** + **Experience** : Deep expertise in cell culture process development for biological products, including media development and bioreactor engineering + **Technical and soft skills** : + Strong leadership and project management capabilities + Proven ability to lead multidisciplinary teams and influence strategic decisions + Expertise in upstream bioprocess development and scale-up + **Education** : Ph.D. in biotechnology, biochemical engineering, or related field + **Languages** : Fluent in English and good working knowledge of French _Note: This position requires frequent interaction with international teams, with English as the primary working language._ **_Why choose us?_** + Come join an expanding team in a dynamic work environment and work with collaborators who are at the top of their field in the pharma industry + Mentor the next generation of process chemistry scientists and help set the synthetic strategy for a growing family of synthetic assets + Access to and help in the development of the latest chemical technologies including continuous, artificial intelligence/machine learning and biosynthetic transformations to deploy on Sanofi’s growing portfolio + Discover the countless opportunities to develop your talents and advance your career, whether through a promotion or an assignment in another organization + Enjoy a well-thought-out, well-designed benefits package that recognize your contribution and amplify your impact + Take good care of yourself and your family with a wide range of health and wellness benefits, including high-quality healthcare, prevention and wellness programs, and at least 14 weeks of gender-neutral parental leave **Pursue** **_Progress_** **.** **Discover** **_Extraordinary_** Join Sanofi and step into a new era of science - where your growth can be just as transformative as the work we do. We invest in you to reach further, think faster, and do what's never-been-done-before. You'll help push boundaries, challenge convention, and build smarter solutions that reach the communities we serve. Ready to chase the miracles of science and improve people's lives? Let's Pursue Progress and Discover Extraordinary – together. At Sanofi, we provide equal opportunities to all regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, protected veteran status or other characteristics protected by law. \#LI-FRA \#LI-Hybrid **Pursue** **_progress_** **, discover** **_extraordinary_** Better is out there. Better medications, better outcomes, better science. But progress doesn’t happen without people – people from different backgrounds, in different locations, doing different roles, all united by one thing: a desire to make miracles happen. So, let’s be those people. At Sanofi, we provide equal opportunities to all regardless of race, colour, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, ability or gender identity. Watch our ALL IN video (https://www.youtube.com/watch?v=SkpDBZ-CJKw&t=67s) and check out our Diversity Equity and Inclusion actions at sanofi.com (https://www.sanofi.com/en/our-responsibility/equality-and-inclusiveness) ! Global Terms & Conditions and Data Privacy Statement (https://www.sanofi.com/en/careers/global-terms-and-conditions/) Sanofi is dedicated to supporting people through their health challenges. We are a global biopharmaceutical company focused on human health. We prevent illness with vaccines, provide innovative treatments to fight pain and ease suffering. We stand by the few who suffer from rare diseases and the millions with long-term chronic conditions. With more than 100,000 people in 100 countries, Sanofi is transforming scientific innovation into healthcare solutions around the globe. Discover more about us visiting www.sanofi.com or via our movie We are Sanofi (https://youtu.be/96EwNjb1TLo) As an organization, we change the practice of medicine; reinvent the way we work; and enable people to be their best versions in career and life. We are constantly moving and growing, making sure our people grow with us. Our working environment helps us build a dynamic and inclusive workplace operating on trust and respect and allows employees to live the life they want to live. All in for Diversity, Equity and Inclusion at Sanofi - YouTube (http://www.youtube.com/watch?v=SkpDBZ-CJKw&t=2s)