Vaccines
Where
extraordinary minds
help protect half a billion people
Scientist
Who we are
Every day, 2.5 million Sanofi vaccine doses reach patients worldwide - powered by bold ideas, cutting-edge science, and passionate people like you. Across every stage — from discovery to delivery — Sanofians are shaping the future of vaccines. In global R&D hubs, exceptional offices, and state-of-the-art manufacturing sites, we’re reimagining what’s possible. But science alone isn’t enough — it’s the extraordinary minds behind it that truly make the difference.
Job Title: Scientist
Grade: L2-1
Hiring Manager: Natalie Anosova
Location: Waltham, MA
About the Job
Purpose & Main Missions:
The Scientist reports directly to the Early-Stage Immunology Laboratory Manager (ESI), Global Immunology (GI), Sanofi Vaccines R&D. This role participates in the development and execution ofexperimentsin immunology projects to evaluate the potential of novel and early-stage vaccine candidates, within the given research areas and defined protocols.
Dimension & Scope:
The Scientist may contribute to projects based in Marcy L’Etoile (France), Waltham or Orlando (US), while being affiliated with a specific site.
The Scientist may be required to work on multiple projects.
We deliver 4.3 billion healthcare solutions to people every year, thanks to the flawless planning and meticulous eye for detail of our Manufacturing & Supply teams. With your talent and ambition, we can do even more to protect people from infectious diseases and bring hope to patients and their families.
Main responsibilities:
Contribute to the progress of immunology projects:
Independently design and perform experimental assays in compliance with study protocols and Standard Operating Procedures to achieve the goals outlined in theexperimental design plan.
Proactively challenge the chosen scientific and technical solutions and propose new approaches when appropriate.
Participate in the quality check, data analysis, interpretation and documentation of the experimental assays.
Synthesize and present concise scientific and data-based presentations with appropriate conclusions.
Collaboratetransversallyonproject operational implementation with various teams and functions, including Global Antigen Design (GAD).
Monitor and reporton activitieswithin their scope:
Proactively alert the Immunology project team to any issues or delays and proposea mitigation plan to minimize impact.
Conduct the reporting of activities under their accountability and contribute tosite, project team or sub team meetings to ensure effective communication and coordination within the site and the projects.
Contribute to the writing of assigned key documents (incl. protocols, assay reports, monthly activity reports).
Develop ESI science and technology expertise:
Demonstrate technical proficiency in a broad array of experimentalassays and technologies.
Analyzerelevant literature provided by Team Members and ESI Subject Matter Experts to become knowledgeable on specific projects.
Extract materials and methods from scientific publications and adeptly transform them into operational laboratory experiments, driving their own technical development.
Develop new protocols and or/methodologies to solve complex problemsand create innovative assaysunder the guidance of ESI Subject Matter Experts.
Actively participate in Technology communities, contributing to knowledge sharing.
Participate in laboratory daily management:
Contribute to laboratory daily management tasks (incl. ordering reagents and consumables,handling shipments).
Support training and technical mentoring, providing guidance to more junior personnel regarding protocol development and execution.
Adhere to HSES policies for personal safety and handling of reagents/biologics/pathogens and stay compliant in applicable trainings.
Identify and help to improve best practices in HSES operations.
Major challenges:
The Scientist faces significant challenges in independently conducting experimental assaysand performing data analysis, which require rigor, analytical thinking and problem-solving skills to guarantee high-quality and reliable results. This role is expected to demonstratematurity in their position and autonomy in developingtechnical skills, as the Scientist must independently translate content from scientific literature into operational experimentsand enhance their readings with their own insights. Effective collaboration and communication skills are essential as cross-functional collaboration is required.
About you
Join us in our mission to advance immunology research and contribute to our groundbreaking projects!
Education:
PhD/MSc in Immunology, Microbiology or related Life Sciences.
Experience:
- PhD in Immunology, Microbiology, or related field (no experience required) OR
- MSc with 5-7 years of relevant laboratory experience
- Proven track record in flow cytometry and immunological techniques
- Experience in vaccine R&D preferred
Technical Skills:
Flow Cytometry Expertise
- Expert-level proficiency in spectral flow cytometry and cell Demonstrated experience in panel development and optimization
- Strong background in equipment operation and maintenance
- Experience with Cytek Aurora and/or SONY spectral sorters preferred
Immunology & Laboratory Skills
- BSL-2 laboratory experience required
- Expertise in human blood/PBMC handling and processing
- Experience with animal primary cells
Soft Skills:
- Strong data analysis and interpretation capabilities
- Excellent documentation and reporting skills
- Ability to work independently and collaboratively
- Effective communication skills (English required, French advantageous)
- Project management experience
Languages:
MLE: English & French. Effective communication skills (English required, French advantageous)
Waltham & Orlando: English, knowledge of French will be reviewed favorably
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.
Sanofi Inc. and its U.S. affiliates are Equal Opportunity and Affirmative Action employers committed to a culturally diverse workforce. All qualified applicants will receive consideration for employment without regard to race; color; creed; religion; national origin; age; ancestry; nationality; marital, domestic partnership or civil union status; sex, gender, gender identity or expression; affectional or sexual orientation; disability; veteran or military status or liability for military status; domestic violence victim status; atypical cellular or blood trait; genetic information (including the refusal to submit to genetic testing) or any other characteristic protected by law.
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All compensation will be determined commensurate with demonstrated experience. Employees may be eligible to participate in Company employee benefit programs, and additional benefits information can be found here.
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.
Watch 'One day at Sanofi' and check out our Diversity Equity and Inclusion initiatives at sanofi.com
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Why work with us
- We’re problem-solvers and pioneers. United by the belief that everyone deserves a healthier future. We create best-in-class vaccines that prevent disease and protect lives.
- Innovation drives us. From AI and mRNA to next-gen science, we push the boundaries to deliver first- and best-in-class vaccines for infectious diseases worldwide.
- Growth happens here. With bold investments in R&D and world-class facilities, Sanofians across the entire vaccine lifecycle are shaping the future of global health.
- We do what’s right. Sustainability and DE&I drive our positive global impact—because the diverse communities Sanofians represent are the patients we serve.
What does it take to protect the world from disease?
For over a century, we’ve been pioneering breakthroughs that help protect millions from diseases like polio, influenza, RSV, and more. And we’re not stopping there.
Powered by groundbreaking technologies - mRNA platforms, recombinant proteins, and AI-driven insights - we’re pushing the boundaries of science.
"I’m immensely proud of the pace of our innovation – the urgency by which our teams are working to transform the practice of medicine."
Thomas Triomphe
Executive Vice President, Vaccines
Discover more
Sanofi’s mRNA Center of Excellence
Step into the future of healthcare with Sanofi’s mRNA Center of Excellence. Discover how a global team is transforming medicine with cutting-edge mRNA technology – and explore the skills, inspirations, and breakthroughs driving this revolution. Ready to shape the future?
About Sanofi Vaccines
Explore our commitment to protecting global health through the power of vaccines. We’re building healthier communities with innovative solutions that save millions of lives each year. Dive into the future of vaccines, discover the diseases we’re tackling, and learn why vaccination is critical at every stage of life.
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