**Job Title:** Winter-Spring 2026 Co-Op-Intern - Biochemistry / Automation **Location:** Waltham, MA **About the Job** 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 Biochemistry, 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, design, perform, and execute protein expression, purification and characterization campaigns at research scales from Hamilton automatic purification system to various instruments for protein purification method, affinity purification, IEX, SEC, et al The candidate could learn various bioanalytical tools such as HPLC, mass spectrometry, DSC, BLI, CryoEM to assess correctly folded protein antigens. 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 Biochemistry 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 sciences or related fieldat an accredited college or universitywith the expectation that you will complete yourcurrent degreeby 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 + **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:** + Proficient in at least one programming language commonly used in data science (e.g., R, Python, C#) + Preferably some R&D experience from lab courses or other experiences in biochemistry, 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. \#GD-SP ​ \#LI-SP \#LI-Onsite \#vhd **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)