Summer-Fall 2026 Molecular Biology - Vaccines Co-op

Location: Waltham, MA 

About the Job

Sanofi is a global healthcare leader focused on patients’ needs engaged in the research, development, manufacturing, and marketing of innovative therapeutic solutions. Sanofi’s core strengths include general medicine, specialty care (rare disease) and human vaccines. The vaccine division of Sanofi provides more than one billion doses of vaccine each year, making it possible to immunize more than 500 million people across the globe. A world leader in the vaccine industry, Sanofi offers the broadest range of vaccines protecting against several infectious diseases.

At Sanofi, our determination inspires us to work tirelessly to make a difference in people’s lives every day, as we continually strive to create a future where everyone has access to groundbreaking medicines and healthcare.

Sanofi’s opportunities offer exposure to a fast-paced and collaborative environment. Student hires work side-by-side with biopharmaceutical professionals, providing an opportunity to make an impact in the lives of patients around the globe.

The Biochemistry Group within the Global Antigen Design (GAD) Department contributes to the development of vaccine candidates from early prototype optimization to IND-enabling activities.  As a co-op in our Biochemistry platform concentrating on molecular biology, you will contribute toward the development of innovative next generation vaccines targeting respiratory pathogens, (which may include seasonal influenza, pandemic influenza, RSV, hMPV and/or COVID). Your primary focus will be on vaccine candidate characterization, and you will work closely with our team of experts to advance Sanofi’s mission to protect and improve human health worldwide. The candidate will learn and apply various molecular techniques including: Assemble, purify, and characterize the DNA with various enzymatic reactions and analytical techniques, electrophoresis, RE digestion, Gibson assembly, Golden Gate assembly, HiFi DNA assembly, PCR, transformation, DNA/RNA extraction, UV/Vis spectrophotometry, sequencing, RT-PCR, and other functional activity assay.  The candidate will also learn our automation system to produce expression plasmids.

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:

• Complete specific laboratory research tasks under supervision and demonstrate high productivity and consistency, with high quality data.

• Learn about the fields of Molecular biology by reading scientific literature and interacting with supervisor and team.

• Maintain and update experiment notebooks according to QA requirements.

• Participate in lab and equipment maintenance, and re-stocking lab supplies.

• Attend group meetings and presents data.

About You

Basic Qualifications:

• Currently enrolled and pursuing a bachelor's or master's degree in life or health sciences, biology, biochemistry, molecular biology, or related science field at an accredited college or university with the expectation that you will complete your current degree by the Spring of 202

• 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:

• R&D experience from lab courses or other experiences in molecular cloning, cell culture, aseptic technique, or lab automated systems.

• Strong knowledge of MS Office including Excel, PowerPoint and Word

• Good interpersonal skills, communication, and ability to work independently and on a team, under supervision.

• Able to perform experiments from verbal or written instructions, while learning and applying new concepts and research procedures.

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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