Jobs / United States / Sanofi US Services INC
Senior Associate Scientist, In Vitro Biology and Mechanism of Action
Sanofi US Services INC · 🇺🇸 Waltham, MA
Sponsorship verdict
Sponsorship possible
One solid signal, not two — worth applying, and worth asking about sponsorship early.
- Employer is on a government sponsor recordThe US Department of Labor certified 47 H-1B/E-3 labor condition applications for this employer between Oct 2025 and Jun 2026 (latest Jun 2026) — the step every H-1B hire needs first. USCIS also records 29 H-1B approvals in FY2023. Source: LCA disclosure data (US Department of Labor (OFLC)).
- The posting doesn’t mention sponsorshipSilence isn’t a refusal — ask the recruiter before investing much time.
- No salary bar for this routeH-1B has no fixed salary bar: the employer must pay at least the prevailing wage for the role and area. Cap-subject employers enter a lottery weighted by wage level. Source: https://www.federalregister.gov/documents/2025/12/29/2025-23853/weighted-selection-process-for-registrants-and-petitioners-seeking-to-file-cap-subject-h-1b, rules effective 2026-02-27.
- What Sanofi US Services INC paid sponsored hires in similar roles6 certified filings for “Senior Scientist” (Biochemists and Biophysicists) in MA: $100k–$122k, median $101k. Most were filed at wage level I (50%) — 1 lottery entry, ≈15% projected selection odds for cap-subject employers. Source: US Department of Labor LCA disclosure data (Oct 2025 – Jun 2026).
- Last confirmed live 2 days agoWhen a source last listed this job as open.
US H-1B: cap-subject employers enter a lottery weighted by wage level — Level I gets 1 entry, Level IV gets 4 (DHS projected selection odds ≈15% at Level I to ≈61% at Level IV). Universities and non-profit research employers are cap-exempt. The $100,000 fee for new petitions from abroad is currently blocked by a court order (appeal pending).
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Sponsor Radar — Sanofi US Services INC
The US Department of Labor certified 47 H-1B/E-3 labor condition applications for this employer between Oct 2025 and Jun 2026 (latest Jun 2026) — the step every H-1B hire needs first. USCIS also records 29 H-1B approvals in FY2023. Source: LCA disclosure data (US Department of Labor (OFLC)).
Past sponsorship or register membership never guarantees sponsorship for this vacancy or for you. Full Sponsor Radar for Sanofi US Services INC →
About the role
Job Title: Senior Associate Scientist, In Vitro Biology and Mechanism of Action • Location: Waltham, MA About the Job We are seeking a highly motivated individual to join the In vitro biology and mechanism of action team within the mRNA center for Excellence to support the advancement of our RNA vaccine platform. As a Senior Associate Scientist, you will be designing and executing experiments to understand the mechanism of RNA therapeutics and vaccines for the treatment of infectious and non-infectious diseases. 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. 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. 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: • Lead from the bench to support the pre-clinical research of Sanofi’s next generation RNA platform and support programs by designing and executing experiments targeted toward elucidating the mechanism of action for RNA vaccines and therapeutics • Perform cell transfection with RNA and LNP formulations to determine efficacy and protein expression using immunofluorescence, live imaging, and reporter assays • Utilize and adapt to a variety of lab techniques such as RT-qPCR, Flow cytometry, western blot, and ELISA to generate high-quality data to support the RNA platform and programs • Maintain both immortalized and primary cell cultures for downstream protein expression and NGS analysis • Conduct decision-quality research, organize, analyze and interpret data, summarize results and prepare technical reports. • Prepare scientific presentations and report project progress at internal team meetings and scientific research forums • Work in a highly collaborative team to drive overall group objectives forward • Assume additional responsibilities as assigned. About You: Basic Qualifications: Education: • Bachelor's OR Master's degree in biology, chemistry, biomedical sciences, pharmaceutical sciences, life sciences or related fields Experience: • Bachelor's holders: Minimum of 2 years of relevant industry, academic or research experience • Master's holders: Minimum of 1 year of relevant industry, academic or research experience • Hands-on background in cell culture • Experience with imaging techniques and microscopy Preferred Qualifications: • Experience working with nucleic acid modalities such as mRNA, siRNA, miRNA, or gene editing • Familiarity with additional lab techniques such as gene expression analysis, protein detection methods, and flow cytometry • Prior experience in a biopharma or biotech company setting • Desire to learn new techniques and scientific concepts to follow the research as it progresses • Excellent communication skills, both oral and written with the ability to convey key experimental findings to internal stakeholders • Well organized with a curious mindset and extreme attention to detail. Strong desire to make an impact • Ability to w