Vaccines
Where
extraordinary minds
help protect  half a billion people

Job title: 6 months internship in drug product development and delivery

• Location: Marcy l’Etoile

• Starting date: February 2027

About the job

As a Drug Product Development & Delivery intern within the mRNA Center of Excellence department, you’ll contribute to the optimisation of the manufacturing process for messenger RNA vaccines in lipid nanoparticles and to the associated physico-chemical characterisation. Ready to get started?

The Drug Product Development France team is responsible for developing the formulation of the finished product and its manufacturing process. It supports all the Centre of Excellence’s mRNA vaccine programmes, from Phase 3 through to commercialisation, thereby helping to transform scientific innovation into vaccines that are accessible to patients.Ready to grow your skills while helping shape the future of healthcare? At Sanofi, you’ll be empowered to learn, ask questions, and bring your ideas to life – all while supported by inspiring mentors and collaborative teams.

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:

• Take part in optimising the manufacturing processes for messenger RNA vaccines encapsulated in lipid nanoparticles
• Contribute to the physico-chemical characterisation of lipid nanoparticles throughout the process
• Support us for in implementing online analytical methods compatible with different production matrices
• Collaborate on improving the thermal stability of the finished product during manufacture and storage
• Contribute to understanding the formation and structure of lipid nanoparticles
• Support us in evaluating the performance of lipid nanoparticles during drug administration
• Take part in suggesting formulation strategies suited to production environments

About you

• Soft and technical skills: curiosity, team spirit, rigour. Experience in nanotechnology

• Education: bac+5 in chemical, chemical engineering, biotechnology

• Languages: fluent in english

Why choose us?

• Launch your career with a company that invests in you — and empowers you to reimagine what’s possible.
• Build your future with access to the latest tools, digital innovation, and continuous learning that keep you ahead of the curve.
• Grow in a purpose-driven company where your voice matters and your work helps improve millions of lives.
• Thrive in inclusive, flexible workplaces that support your personal and professional well-being.
• An attractive internship bonus.
• Depending on your location, access to a company restaurant with a contribution from Sanofi.
• Our recruitment process is designed to be fast and efficient. If your application is accepted, you will receive a call from our recruiter for an initial telephone interview, followed by a quick meeting with the manager.

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.

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.