Job Title: Senior Associate Scientist, In Vitro Biology and Mechanism of Action

• Location: Waltham, MA

About the Job

We are seeking a highly motivated individual to join the In vitro biology and mechanism of action team within the mRNA center for Excellence to support the advancement of our RNA vaccine platform. As a Senior Associate Scientist, you will be designing and executing experiments to understand the mechanism of RNA therapeutics and vaccines for the treatment of infectious and non-infectious diseases.

We are an innovative global healthcare company that helps the world stay ahead of infectious diseases by delivering more than 500 million vaccine doses a year. Across different countries, our talented teams are exploring new technologies to protect people and promote healthy communities. We chase the miracles of science every single day, pursuing progress to make a real impact on millions of patients around the world.​

Join the team protecting half a billion lives every year with next-gen science, mRNA innovation, and AI-driven breakthroughs. In Vaccines, you’ll help advance prevention on a global scale - and shape the future of immunization.

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 from the bench to support the pre-clinical research of Sanofi’s next generation RNA platform and support programs by designing and executing experiments targeted toward elucidating the mechanism of action for RNA vaccines and therapeutics

• Perform cell transfection with RNA and LNP formulations to determine efficacy and protein expression using immunofluorescence, live imaging, and reporter assays

• Utilize and adapt to a variety of lab techniques such as RT-qPCR, Flow cytometry, western blot, and ELISA to generate high-quality data to support the RNA platform and programs

• Maintain both immortalized and primary cell cultures for downstream protein expression and NGS analysis

• Conduct decision-quality research, organize, analyze and interpret data, summarize results and prepare technical reports.

• Prepare scientific presentations and report project progress at internal team meetings and scientific research forums

• Work in a highly collaborative team to drive overall group objectives forward

• Assume additional responsibilities as assigned. 

About You:

Basic Qualifications:

Education:

• Bachelor's OR Master's degree in biology, chemistry, biomedical sciences, pharmaceutical sciences, life sciences or related fields

​Experience:

• Bachelor's holders: Minimum of 2 years of relevant industry, academic or research experience

• Master's holders: Minimum of 1 year of relevant industry, academic or research experience

• Hands-on background in cell culture

• Experience with imaging techniques and microscopy

Preferred Qualifications:

• Experience working with nucleic acid modalities such as mRNA, siRNA, miRNA, or gene editing

• Familiarity with additional lab techniques such as gene expression analysis, protein detection methods, and flow cytometry

• Prior experience in a biopharma or biotech company setting

• Desire to learn new techniques and scientific concepts to follow the research as it progresses

• Excellent communication skills, both oral and written with the ability to convey key experimental findings to internal stakeholders

• Well organized with a curious mindset and extreme attention to detail. Strong desire to make an impact

• Ability to work collaboratively in a fast-paced, cross-functional, demanding work environment without compromising quality. Understand the sense of urgency and respect project timelines

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.

• Work at the forefront of AI-driven research, smart manufacturing, and groundbreaking mRNA platforms that are redefining the future of immunology.

• Help protect half a billion people every year, contributing to one of the largest global vaccination efforts in healthcare.

• Develop your career with access to mentoring, international mobility programs, and opportunities to grow across four continents.

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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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.

Sanofi US endeavours to make our career center accessible to any and all users. If you are experiencing difficulty and need assistance applying online, please call 1-866-SANOFI2 (1-866-726-6342) or click here

US and Puerto Rico Residents Only

Sanofi Inc. and its U.S. affiliates are Equal Opportunity employers committed to a culturally inclusive 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.

North America Applicants Only

The salary range for this position is:

$75.000,00 - $108.333,33

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.