Vaccines
Where
extraordinary minds
help protect  half a billion people

Job Title: Summer-Fall 2026 Semi-Automated and Automated Assays, Early-Stage Immunology Co-op

Location: Waltham, MA     

About the Job

The Global Immunology Department in Sanofi, Vaccines R&D organization is seeking a highly motivated and organized co-op student to join the Early Stage Immunology group. 

This position will serve as an integral member of a research team responsible for performing experimental in vitro and clinical exploratory studies to assess the immunogenicity, reactogenicity, and mechanism of action of vaccine and drug candidates. 

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:

• Develop and exploit immunological methods for the analysis of human viral vaccine candidates under pre-clinical development.

• Build relationships and manage project-specific tasks across different groups as requires by the project.

• Be responsible for laboratory testing examining the immunological attributes of the biological samples from humans and various animal species such as mice, and non-human primates.

• Get trained and subsequently apply hands-on expertise with in-vitro immune-assays like neutralization and antibody binding assay profiling, and automation. Perform titrations of viruses using cell lines as required.

• Participate in laboratory upkeep as required.

• Have a strong hands-on commitment to laboratory research towards establishing best practices while promoting a safe working environment.

• Be responsible for assembly of own laboratory data, preliminary analysis, and appropriate documentation through electronic laboratory notebooks. Actively participate in the project/group meetings through attendance, presentation of his/her own data and contributing to the discussion. May participate in the transfer of immunoassays into late stage immunology groups.

All work is performed in BioSafety Level 2+ (BSL2+) laboratory environment and will involve health and safety training to get clearance for entry to the laboratories.

About You

Basic Qualifications:

• Currently enrolled and pursuing a bachelor’s or master's degree in biology, biotechnology, immunology, virology or a related field 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 internship/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/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:

• Understanding of principals of binding assays (like ELISA) and serum antibody-based neutralization assays

• Strong organizational skills, willingness and ability to quickly adjust to a new environment and learn new laboratory techniques

• Ability to work independently (once trained) and in the team and plan your own workday

• Hands-on technical experience with sterile environment is a plus

• Experience with Graphpad Prism or alternative software is a plus

• Understanding of safe lab practices and experience in working in BSL2+ environment with infectious agents requirements is a plus

• Proficient English language written and verbal skills are required

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. 

• Exposure to cutting-edge technologies and research methodologies. 

• Networking opportunities within Sanofi and the broader biotech community. 

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.

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