Jobs / United States / Sanofi US Services INC
Postdoctoral fellow in structural biology and NMR spectroscopy
Sanofi US Services INC · 🇺🇸 Vitry-sur-Seine
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 roles1 certified filing for “Solution Architect - RnD - In-Silico CMC” (Information Technology Project Managers) in MA: $141k–$141k, median $141k. Most were filed at wage level IV (100%) — 4 lottery entries, ≈61% projected selection odds for cap-subject employers. Source: US Department of Labor LCA disclosure data (Oct 2025 – Jun 2026).
- Confirmed live todayWhen 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 : postdoctoral fellow – Structural biology / NMR spectroscopy ● Location: Vitry-sur-Seine About the job As a Postdoctoral Fellow in the Biophysics & BioNMR / BioAnalytics team, you will investigate how Post Translational Modifications (PTMs) in antibody CDRs affects antigen binding and molecular stability. This project aims to develop a comprehensive methodology combining experimental structural biology (2D/3D-NMR, cryo-EM, crystallography, HDX-MS) with computational modelling to elucidate how PTMs in CDR modulate Fab structure and antigen recognition. Your work will directly support molecule optimization and manufacturing process development. 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: • Produce and characterize samples with different levels of modification by mass spectrometry, SEC, DSC and binding assays. • Perform 2D-NMR analysis on modified and unmodified mAb/Fab samples to map chemical shift perturbations and identify structural signatures induced by PTMs. • Produce samples via cell-free expression. • Structurally characterize the Fab-antigen interaction by NMR, cryo-EM, crystallography and HDX-MS data, to provide an integrated view of how PTMs modulate binding and stability. • Design, produce and evaluate mutated Fab constructs to determine the role of residues neighboring the PTMs binding affinity and molecular stability. • Present findings to cross-functional teams and contribute to scientific publications. About you • Education: PhD in NMR spectroscopy, structural biology, biophysics or a related field • Experience & technical skills: Hands-on expertise in protein production including U-¹³C, ¹⁵N and ²H isotope labelling and specific methyl labelling; proven experience in NMR assignment of high molecular weight proteins (backbone and methyl groups) • Languages: Fluent English, intermediate level of French • Soft skills: Strong analytical mindset, curiosity, autonomy, and ability to collaborate within a multidisciplinary team Why choose us? • Learn from inspiring mentors and collaborative teams while contributing to real projects that shape the future of healthcare. • Launch your career with a company that invests in you — and empowers you to reimagine what’s possible. • Enjoy opportunities to collaborate beyond your area of expertise, working with diverse teams across science to spark new ideas and drive breakthroughs. • Work at the forefront of drug discovery, harnessing cutting-edge AI, data, and digital platforms to push the boundaries of science. • Join a workplace where diversity, equity, and inclusion are at the core, with Employee Resource Groups and leadership programs that celebrate every voice. 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, protect