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Senior scientist- Purification development

Sanofi

Vitry-sur-Seine permanent

Posted: March 20, 2026

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Quick Summary

We are looking for a Senior scientist to develop purification processes for Sanofi's biologics pipeline, with a focus on scalable and innovative methods.

Job Description

Senior scientist- Purification development – Job description

Job title: Senior scientist - Purification Development 

• Location : Vitry-sur-Seine, France
• Grade: L2
• Hiring Manager : Benoit MOTHES

About the job

We have a new opportunity in our CMC Development organization based in Vitry-Sur-Seine as Senior Purification Process Development Scientist. The Global Purification Process Development group within Sanofi operates with the mission to develop robust, scalable and innovative purification processes for Sanofi’s very diverse early and late-stage biologics pipeline. We are looking for a candidate with excellent scientific, communication, and project management skills to join a team of downstream development scientists and engineers. The Scientist is expected to work collaboratively with others in the team to establish and implement best laboratory practices and lead the execution of complex experiments.

Join us to further fuel innovation in our current pipeline and support our goal: to help patients in need.

Main responsibilities:

• Independently lead the design, execution and data analysis of downstream process development studies, innovation technologies and potential investigations
• Coordinate laboratory activities and manage a team of 2 or more technicians
• Align experimental approaches to overall project goals
• Technical lead to scale-up and transfer the established process into pilot plant and commercial facilities
• Author and review internal and regulatory documentation, technical reports and scientific article
• Lead projects to develop and implement state of the art purification technologies
• Pro-actively collaborate and maintain daily exchanges with other sites (US and GER). Work closely and independently with counterparts in CMC Development and other functions along the value chain to deliver on CMC milestones while adhering to project timelines
• Participate in global initiatives for continuous improvement of our purification platform, process development approaches and ways of working

About you

Experience: Bioprocess development and technical transfer

Soft Skills:

• Excellent oral and written communication skills
• Project and people management skills
• Scientific presentation (internal & external)
• Excellent organizational and record keeping skills
• Innovative, critical, and creative thinker
• Ability to work in cross-functional environment
• Strong analytical and problem-solving skills
• Able to become a project leader (DS leader role, leader for global initiatives, Key person or expert for technical topics)

Technical skills

• Bioprocess development and technology transfer
• Chromatography purification, tangential and normal filtration
• Design Of Experiment and statistical data analysis
• Digital proficiency
• Understanding of complex R&D and M&S landscapes
• Understanding GMP operation, process validation, and scale-up manufacturing
• Understanding analytical techniques

Education:

• Ph.D. (biology, biochemistry or chemistry) or engineer with at least 2 years of professional experience in bioprocess development or manufacturing

Languages: English, French

What we offer

• Join an expanding team in a dynamic work environment surrounded by other biotechs and top universities.
• Leading a team of 2+ technicians and serving as technical lead on critical scale-up and tech transfer projects—providing immediate visibility and influence on Sanofi's strategic biologics pipeline.
• Access state of the art technology including continuous, artificial intelligence, machine learning, robotics and biosynthetic transformations to build Sanofi’s next generation medicines.
• Bring the miracles of science to life alongside a supportive, future-focused team.
• Discover endless opportunities to gain experience and drive your career, whether it is 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.

Pursue Progress. Discover Extraordinary.

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. You can be one of those people. Chasing change, embracing new ideas and exploring all the opportunities we have to offer. Let’s pursue progress. And let’s 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, or gender identity.

Watch our ALL IN video and check out our Diversity Equity and Inclusion actions at sanofi.com!

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 and check out our Diversity Equity and Inclusion actions at sanofi.com!

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