Job Title: Winter-Spring 2026 Co-Op - mRNA Analytical Science Biochemistry Location: Waltham, MA

About the Job

As a mRNA Co-op Student in Analytical Sciences, you will participate in analytical development activities to support development and characterizations of mRNA vaccines in development.

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:

• Perform mRNA vaccine analytical testing in the lab, data analysis, and related document writing with a critical look at the relevance of the results.

• Perform sample preparation following existing SOPs or analytical procedures.

• Develop analytical characterization methods and perform testing for mRNA drug substance and mRNA-LNP drug product.

• Perform chromatography method development, optimization, qualification, and testing.

• Perform data analysis, and related document writing with a critical look at the relevance of the results.

• Develop and write work plans/protocols.

• Summarize and communicate the progress of your work.

• Participate in laboratory automation to set up high-throughput analyses.

• Accompany and train newcomers in analytical technologies and methods.

• Participate laboratory organization activities (management/maintenance of equipment, reception & verification of reagents and receipt of samples).

• Compliant to Sanofi Quality standards and HSE policy. Participate in continuous improvement of laboratory safety and quality compliance.

About You

Basic qualifications:

• Currently pursuing a bachelor’s, master’s, or PhD degree in Analytical Chemistry, Biology, Biochemistry or other STEM related field at an accredited college or university

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

• Must be permanently authorized to work in the U.S. and not require sponsorship of an employment visa (e.g., H-1B or green card) at the time of application or in the future. Students currently on CPT, OPT, or STEM OPT usually require future sponsorship for long term employment and do not meet the requirements for this program unless eligible for an alternative long-term status that does not require company sponsorship ​

Preferred Qualifications:

• 0-2 years of professional laboratory experience in the vaccine or pharmaceutical industry in the field of R&D, QC analytics.

• Good professional writing skills.

• Essential qualities include ability to work in a fast paced, matrix environment; agility to respond to urgent requests, and initiative to lead new tasks.

• Adherence to Quality and HSE aspects.

• Attention to detail and ability to execute under the guidance of mentors.

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.​

The salary range for this position is ​$29-$57 hourly​. All compensation will be determined commensurate with demonstrated experience. Employees may be eligible to participate in Company employee benefit programs. Additional benefits information can be found through LINK.

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.

At Sanofi, we provide equal opportunities to all regardless of race, colour, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, ability or gender identity.

Watch our ALL IN video and check out our Diversity Equity and Inclusion actions at sanofi.com!

US and Puerto Rico Residents Only

Sanofi Inc. and its U.S. affiliates are Equal Opportunity and Affirmative Action employers committed to a culturally inclusive and diverse workforce. All qualified applicants will receive consideration for employment without regard to race; color; creed; religion; national origin; age; ancestry; nationality; natural or protective hairstyles; 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.