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**Job Title:** Winter-Spring 2026 Co-Op - Drug Product Development

**Location:** Framingham, MA

About the Job

Join the team transforming care for people with immune challenges, rare diseases, cancers, and neurological conditions. In Specialty Care, you’ll help deliver breakthrough treatments that bring hope to patients with some of the highest unmet needs.

We seek a highly motivated Co-op to join Cell Line Development (CLD), a growing department responsible for generating mammalian cell lines for Sanofi’s R&D biologics pipeline and implementing new technologies and processes for continuous platform improvement. CLD, located in Framingham MA, is global function, supporting research and early development projects at three Sanofi R&D Hubs (North America, France, Germany), and team members routinely work with colleagues at different sites. The work site for this role is Framingham, MA and the candidate should have independent transportation available.

The person in this role will work in a high-performing, fast-paced collaborative environment, and help drive optimization for cell line production of biologics including antibodies and diverse, novel formats. The successful candidate will plan and conduct experiments towards the development of CHO based technologies inclusive of gene design and expression, transfection optimization strategies, building databases, and other cell line development activities. The Co-op will have the opportunity to work both independently as well as part of the team to achieve CLD development objectives. Through this experience, s/he will gain knowledge on CHO production platforms for recombinant Biologics, manufacturing challenges and optimization strategies as well as general drug product development process in an industrial setting.

**At this time, Sanofi will not sponsor a new applicant for employment authorization, or offer any immigration related support for this position (i.e. H1B, F-1 OPT, F-1 STEM OPT, F-1 CPT, J-1, TN, or another type of work authorization). **

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.

Main Responsibilities:

+ Work with supervisor to plan, design and execute experiments, analyze data, and interpret experimental results.

+ Perform mammalian cell culture experiments including cell thaw, maintenance & routine culture, cell transfection, selection, cell freezing and production batches.

+ Document laboratory experiments in a timely manner, following standard guidelines.

+ Work on other experiments and duties as assigned, in discussion with the supervisor.

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About You

Basic Qualifications:

+ Must be a current co-op at Sanofi

+ Currently enrolled a pursuing a master's degree or higher in biotechnology, molecular biology, cell biology, or related field at an accredited college oruniversitywiththe expectation that you will complete yourcurrent degreebytheSpring of 2027

+ Must be able to relocate to the office location and work 40 hrs./week for the full duration of the internship/co-op

+ Must have permanent US work authorization

Preferred Qualifications:

+ Experience with molecular biology, mammalian cell culture/aseptic techniques preferred.

+ Ability to use basic Microsoft office software such as Office, Excel and PowerPoint.

+ Able to communicate with supervisor and team effectively.

+ Pay attention to details and possess good organizational skills.

+ Critical thinking skills and innovative, creative mindset.

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.

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 (https://www.youtube.com/watch?v=SkpDBZ-CJKw&t=67s) and check out our Diversity Equity and Inclusion actions at sanofi.com (https://www.sanofi.com/en/our-responsibility/equality-and-inclusiveness) !

_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.

Global Terms & Conditions and Data Privacy Statement (https://www.sanofi.com/en/careers/global-terms-and-conditions/)

Sanofi is dedicated to supporting people through their health challenges. We are a global biopharmaceutical company focused on human health. We prevent illness with vaccines, provide innovative treatments to fight pain and ease suffering. We stand by the few who suffer from rare diseases and the millions with long-term chronic conditions.

With more than 100,000 people in 100 countries, Sanofi is transforming scientific innovation into healthcare solutions around the globe. Discover more about us visiting www.sanofi.com or via our movie We are Sanofi (https://youtu.be/96EwNjb1TLo)

As an organization, we change the practice of medicine; reinvent the way we work; and enable people to be their best versions in career and life. We are constantly moving and growing, making sure our people grow with us. Our working environment helps us build a dynamic and inclusive workplace operating on trust and respect and allows employees to live the life they want to live.

All in for Diversity, Equity and Inclusion at Sanofi - YouTube (http://www.youtube.com/watch?v=SkpDBZ-CJKw&t=2s)