R&D Where your curiosity drives the miracles of science

Job title : Mass Spectrometry Senior Scientist

• Location: Montpellier

About the job

As a Mass Spectrometry Senior Scientist within the Analytical Sciences team, you will act as a scientific leader and technical expert in mass spectrometry, providing high ‑ level analytical support to CMC development projects.

Part of the Synthetic Platform within Global CMC Development, the Analytical Sciences group strives to be an industry leader in the development of transformative medicines. In this role, you will lead complex mass spectrometry studies, drive technical excellence, and contribute to the robustness, innovation, and regulatory compliance of analytical strategies. You will also play a key role in mentoring scientists and supporting the continuous evolution of mass spectrometry capabilities within the laboratory.

This position is based onsite in Montpellier, France.

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:

• Lead complex mass spectrometry activities within CMC development projects by designing, developing, validating, and troubleshooting advanced HPLC ‑ HRMS and GC ‑ MS methods, and acting as a key scientific interface to resolve complex structural and analytical challenges.

• Serve as a recognized technical expert and referent in mass spectrometry, providing scientific guidance and technical review to scientists on challenging analytical topics.

• Define and implement project ‑ level analytical strategies for nitrosamine and mutagenic impurities, in alignment with Sanofi CMC and Analytical Sciences guidelines.

• Potentially lead analytical activities within project teams.

• Ensure close interaction with chemistry teams to support ongoing synthetic activities, provide analytical input, and contribute to the understanding and follow-up of chemical development.

• Prepare, review, and scientifically endorse analytical documentation (protocols, reports, procedures), ensuring full data traceability and compliance with GMP requirements , including support for clinical and regulatory submissions.

• Mentor and scientifically coach others , contributing to skills development, best practices, and overall laboratory expertise.

• Present scientific results and technical positions within and across departments.

• Drive continuous improvement and modernization of mass spectrometry capabilities by monitoring scientific and technological advances, implementing innovative tools and AI ‑ supported solutions, and providing advanced technical support for complex laboratory issues in close collaboration with laboratory leadership.

• Contribute to scientific publications and represent Sanofi at conferences or scientific meetings as a subject ‑ matter expert in mass spectrometry.

About you

Experience :

• Proven expertise in high ‑ resolution mass spectrometry with significant experience in analytical method development and validation.

• Strong understanding of GMP and regulatory expectations related to analytical development.

Soft and technical skills :

• Proficiency with advanced mass spectrometry platforms (Orbitrap, Q ‑ ToF, Triple Quad) and data processing software (MassLynx, Xcalibur, Chromeleon).

• Strong analytical thinking and problem ‑ solving capabilities applied to complex scientific challenges.

• Excellent communication skills, with the ability to clearly explain complex scientific concepts.

• Collaborative mindset with demonstrated ability to mentor and influence others scientifically.

Education : PhD in Analytical Chemistry, Organic Chemistry, or related field with specialization in Mass spectrometry

Languages : Fluent in French and English

Why choose us?

• Bring the miracles of science to life alongside a supportive, future-focused team

• Enjoy opportunities to collaborate beyond your area of expertise, working with diverse teams across science, clinical, and digital fields to spark new ideas and drive breakthroughs.

• Work at the forefront of drug discovery, harnessing cutting-edge AI, data, and digital platforms to push the boundaries of science.

• Collaborate with world-class scientists and experts across multiple disciplines.

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. W e 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.

Final compensation will be determined based on demonstrated experience, skills, location, and other relevant factors. Employees may be eligible to participate in Company employee benefit programs.