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Job Title: Fall 2026 Co-Op - Large Molecules Research

Location: Cambridge, MA

About the Job

At Sanofi we are committed in our quest to be a world-class biologics research organization. We are pioneering innovation in biologics with the first approved nanobody drug, the first clinical stage tri-specific antibody, and novel synthetic biology for new engineering paths.

Our global Large Molecule Research (LMR) platform focuses on antibodies, nanobodies and synthorins as therapeutic modalities to partner closely with other research platforms and Sanofi’s therapeutic areas (Immunology, Oncology, Rare Disease and Neurology) in the discovery and ultimate delivery of new candidate molecules into our pipeline.

Responsibilities in this co-op may include:

• Express and purify recombinant antibodies, antigens, and fusion proteins from mammalian expression systems

• Perform analytics to ensure the purity, quality, and function of recombinant proteins

• Initiate, design, and perform innovative technology development experiments

• Present data to department and project teams

• Ensure thorough and compliant experimental data capture to enable training of ML/AI algorithms

• Interface with digital teams to automate data management bottlenecks 
  

About Sanofi 

We’re an R&D-driven, AI-powered biopharma company committed to improving people’s lives and delivering compelling growth. Our deep understanding of the immune system – and innovative pipeline – enables us to invent medicines and vaccines that treat and protect millions of people around the world. Together, we chase the miracles of science to improve people’s lives. 

About You

Basic Qualifications:

• Currently enrolled and pursuing a bachelors or masters degree in Molecular Biology, Biology, Chemistry, Engineering, or related STEM field at an accredited college or university with the expectation that you will complete your current degree by the Spring of 2028

• Must be enrolled in an accreditedcollege or university throughout the duration of the co-op/internship

• Must be able torelocateto 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:

• Passion for scientific rigor with a curiosity and drive to explore new scientific questions

• Ability to troubleshoot technical and scientific problems, analyze and interpret experimental data and suggest next steps

• Excellent organizational and time management skills are required

• Experience with mammalian cell culture including sterile technique and use of biosafety cabinet (BSC)

• Experience with mammalian expression systems (CHO, HEK cells) and general transfection techniques

• Experience with general biologics analytical characterization and techniques

• Experience or knowledge of affinity-based and/or conventional chromatographic separation systems and techniques (Akta protein purification systems and Unicorn software)
  

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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