
Vaccines
Where
extraordinary minds
help protect half a billion people
Senior Associate Scientist Bioimaging
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.
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: Senior Associate Scientist, Bioimaging, Immunohistology and Immunology
Location: Marcy L' Etoile
About the job
As an experienced Bioimaging Associate Scientist, you will oversee designing, performing and optimizing in vivo imaging studies to characterize mRNA-LNP formulations and to decipher mode of actions.
Main responsibilities:
Design, perform and optimize in vivo imaging studies to characterize new vaccine candidates in adequate preclinical models. Creating and developing advanced in vitro, in vivo and ex vivo studies utilizing nucleic acid bio-analytics, and wide range of preclinical, cell biology and optical microscopy analysis
Especially use bioimaging tools to support mRNA and Lipid Nanoparticles process Development and Optimization. Coordinate the bioimaging activities, compile the analytical data package to support advancement of mRNA and other development candidates
Design and troubleshoot protein and molecular assays for use on in vitro and in vivo samples including: mammalian cell transfections, ELISA, functional antibody assays, flow cytometry, reporter assays, activity assays
Design and troubleshoot cell-based methods and immunoassay methods
Critically analyze, interpret, and report experimental results; draw appropriate conclusions and design next steps. Contribute to the protocol, report writing when appropriate including reports to include in Health Authorities dossiers
Work in highly collaborative cross functional teams. Make scientific presentation and report project Progress in mRNA center of excellence team meetings in both languages, English and French
Ensure timely completion of assignments and deliverables
About you
Experience:
High experience in bioimaging and animal sciences
At least 3+ years in mRNA field and 10+ years of pharma/biotech
Skilled in bioimaging and ability to perform complex method, in vivo model development and propose appropriate method improvement
Experience in computerized tomography, bioluminescence and fluorescence imaging
Experience in optical imaging with IVIS Spectrum-CT, Cellvizio fibered Laser Endomicroscope and Kaer Imaging System. Able to use M3 Vision, Living Image, ICViewer, ImageJ/Fiji and KIScontrol softwares
Experience in pharmacology in vivo, Surgery models, Pathophysiology, Histology and Immunohistochemistry
Management of preclinical sample and collection (blood, serum, organs, etc.)
French License on animal experimentation in biology is mandatory: FELASA category B or C
Experience in working with biosafety level 2 and 3 constraints and Specific Pathogen Free animal facilities
Experience in mammalian cell culture and transfection, ELISA, functional antibody assays and flow cytometry would be really appreciated
Proven capability of evaluating/developing new technologies
Experienced working with highly technical projects with reactivity
Able to work independently and collaborate in team, enthusiastic and self-motivated
Languages:
Excellent verbal and written communication skills in English and French
Education:
Bachelor’s degree or MSc/Engineer
As a healthcare company and a vaccine manufacturer, Sanofi has an important responsibility to protect individual and public health. This position will require individuals to be fully vaccinated against Flu as part of your job responsibilities.
PursueProgress. 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 videoand check out our Diversity Equity and Inclusion actions at sanofi.com!
#LI-FRA #LI-Hybrid
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 '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
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Sanofi’s mRNA Center of Excellence
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