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Senior Scientist - Vaccines

Synthorx

Synthorx

Swiftwater, PA, USA
USD 100,500-145,166.66 / year
Posted on Mar 28, 2026

Job title: Senior Scientist - Vaccines

Location: Swiftwater, PA

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.

The Global Clinical Immunology (GCI) organization, part of Late Stage Global Immunology within Vaccines R&D, specializes in developing, validating, and deploying regulated bioanalytical assays to assess immune responses to vaccines throughout their lifecycle. Our mission is to provide specialized immunology expertise and generate robust clinical datasets that inform decision-making for both clinical development and post-licensure activities. Our GCLP-compliant bioanalytical laboratories are based in Swiftwater, PA. The Senior Scientist for the Logistics and LCM Platform will design, develop, qualify, validate, and implement ligand-binding and functional immunoassays that support clinical endpoints across the Sanofi viral and bactericidal vaccine portfolio. The role demands expertise in methods and technologies that include ELISA, SBA, ECL, neutralization assays, and automated platforms.

The candidate will also be expected to provide mentorship and effectively supervise and train lab personnel to perform assigned tasks while ensuring applicable compliance and regulatory agency standards are met. The candidate will serve as key resource as expert technical representation within the organization and on multidisciplinary teams. This is a laboratory-based role requiring at least 60% of time conducting hands-on experimental work while driving innovation in assay 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:

Scientific Operations and Management (85%)

  • Build and establish novel ligand-binding and functional immunoassays for clinical studies.

  • Interpret, summarize and report complex data sets with clear and concise oral and written communications.

  • Serve as an internal subject matter expert on developed assays and demonstrate the ability to educate, train or mentor other team members.

  • Perform/support activities to ensure test method life cycle management (documentation, method suitability/trending, maintenance, etc.).

  • Support completion of analytical deliverables to meet project milestones.

  • Lead and assist in the evaluation of new technologies and automation improvements to support analytical expertise as required.

  • Works with internal and external partners in support of collaborative projects

Laboratory Operations (5%)

  • Under direction of management, plans and oversees the day-to-day operations and general activities associated with one or more laboratories/projects.

  • Ensures laboratory resources (materials/reagents/equipment/facilities) are maintained to meet assigned objectives.

  • Support a quality and compliant testing environment (laboratories, equipment, reagents, training and documentation, methods, personnel).

  • Maintain alignment of processes and procedures. Share best practices within team/platform.

Personnel Supervision and Management (5%)

  • Oversees operational activities of staff working in the laboratory.

  • Provides guidance and expert advice to staff on technical issues, safety procedures and regulatory compliance matters within the laboratory. Monitors operations to ensure compliance.

  • Ensures that new employees are appropriately trained and familiar with laboratory operational requirements.

  • Provide guidance and training for complex molecular assays.

Financial Operations (1%)

  • Tracks/manages expenditures against assigned budgets.

  • Obtain quotes for equipment and reagents and advises management of significant budget deviations.

Regulatory/Quality Management (4%)

  • Ensures adherence to all applicable quality, corporate, safety, and regulatory requirements.

  • Serve as Subject matter Expert (SME) as required.

  • Support departmental quality by ensuring adequate support for documentation, investigation, and closure of quality items including change controls, deviations, and CAPAs.

About You

Specialized degree in biological sciences or related field, from an accredited university.

B.Sc. + 8+ years of industry and/or academia relevant experience

M.Sc. + 5+ years of industry and/or academia relevant experience

PhD + 1+ years of industry and/or academia relevant experience

Involvement working in a regulated environment with assay development and method development experience.

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 and check out our Diversity Equity and Inclusion actions at sanofi.com!

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.

North America Applicants Only

The salary range for this position is:

$100,500.00 - $145,166.66

All compensation will be determined commensurate with demonstrated experience. Employees may be eligible to participate in Company employee benefit programs. Additional benefits information can be found through the LINK.