Job Title: 2026 Fall Co-Op - Drug Substance Development, mRNA, Engineer - Vaccines Location: Waltham, MA About the job Join the team protecting half a billion lives every year with next-gen science, mRNA innovation, and AI-driven breakthroughs. In Vaccines, you'll help advance prevention on a global scale - and shape the future of immunization. At Sanofi, we chase the miracles of science, and we know mRNA has a role to play in the future of health. And while the pandemic has shaken up our ind