Job Title: Winter-Spring 2026 Co-Op-Intern - Bioassay Development

Location: Framingham, MA

About the Job

Are you ready to shape the future of medicine? The race is on to speed up drug discovery and development to find answers for patients and their families. Your skills could be critical in helping our teams accelerate progress.

We are seeking a highly motivated Intern (co-op) to join a high-performing, collaborative Bioassay and Molecular (BAM) Analytical team / Analytical Bioassay Cell Line Development (ABCD) team within MAM Units in Bioanalytics located in Framingham, MA. A significant part of this role consists of performing hands-on laboratory activities. Co-op will be involved in developing robust and QC-friendly cell-based bioassays to support and characterize the biological activity of therapeutic products. He/she will learn many techniques including tissue culture aseptic techniques, cell line engineering techniques, and various cell-based bioassays.

We are an innovative global healthcare company with one purpose: to chase the miracles of science to improve people’s lives. We’re also a company where you can flourish and grow your career, with countless opportunities to explore, make connections with people, and stretch the limits of what you thought was possible. Ready to get started?

Main Responsibilities:

• Work with supervisor to plan, design, and execute experiments, analyze data, and interpret experimental results.
• Perform mammalian cell culture experiments including cell maintenance, cell transfection, and infection.
• Ensure timely completion and delivery of analytical results
• Help to maintain chemical/reagent inventory, MSDS, and instruments.
• Present results within cross-functional teams
• Contribute to the authoring of technical reports & Standard Operating Procedures (SOPs)
• Perform analytical procedures following method protocols (SOPs)
• Maintain Good Manufacturing Practices (GMP) including detail-oriented laboratory notebook documentation

About You

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

Basic Qualifications:

• Currently enrolled and pursuing a master's degree or PhD in biological science or 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 able to relocate to the office location and work 40hrs/week, Monday-Friday, for the full duration of the co-op/internship
• Basic understanding of Cell and Molecular Biology

Preferred Qualifications:

• Knowledge and exposure to PCR, and other cell and molecular biological techniques
• Ability to work in Biosafety Level 2 and follow safe lab procedures
• Excellent communication and writing skills
• Proficiency in Microsoft Office Software such as Excel and PowerPoint
• Hands-on experience with mammalian cell culture/aseptic techniques preferred
• Hands-on experience with cell and molecular biology techniques
• Able to communicate with supervisor and team effectively
• Pay attention to details and possess good organizational skills

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

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.