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Vaccines
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2025 Summer-Fall Co-op - mRNA Drug Product Development - Vaccines

Waltham, Massachusetts
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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: 2025 Summer-Fall Co-op – mRNA Drug Product Development - Vaccines 

Location: Waltham, MA

About the Job 
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.​

Main Responsibilities:

  • The cop-op will work in the drug product development team on producing and characterizing mRNA-containing lipid nanoparticles (LNP).

  • Under supervision, he/she will develop a suitable procedure and protocol for producing LNP and biophysically characterizing mRNA-LNP and help establish a relationship between the characteristics of the LNPs and important quality attributes of LNP as a drug product.

  • The activities will include a literature search, wet lab experiments, and producing required documentation and reports.

About You


Basic Qualifications:

  • Currently pursuing a bachelor's or master's in Pharmaceutical Sciences, Chemical Engineering, Biomedical Engineering, Biochemistry, or a related discipline at an accredited college or university with the expectation that you will complete your current degree by the Spring of 2027 

  • Must be enrolled in school the semester following your co-op with Sanofi

  • Must be able to relocate to the office location and work 40hrs/week, Monday-Friday, for the full duration of the co-op

  • Must have permanent US work authorization 

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.​

**At this time, Sanofi will not sponsor a new applicant for employment authorization or offer any immigration related support for this position (i.e. H1B, F-1 OPT, F-1 STEM OPT, F-1 CPT, J-1, TN, or another type of work authorization). **

The salary range for this position is $29-$45 hourly​. All compensation willbedeterminedcommensuratewithdemonstratedexperience. Employeesmaybeeligible to participate in Companyemployeebenefitprograms. Additionalbenefits information can befoundthroughLINK.

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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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."
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Thomas Triomphe

Executive Vice President, Vaccines

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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?

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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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