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Medical Science Liaison US - NJ, DE, Eastern PA

Synthorx

Synthorx

Morristown, NJ, USA · Philadelphia, PA, USA
Posted on Jan 29, 2026

Job Title: Medical Science Liaison

  • Location: Morristown, NJ

About the Job

The North American Medical Team at Sanofi is a high-performing team of medical leaders who are a trusted source of scientific and medical information and shared insights; effective and innovative strategic partners to our internal and external stakeholders; and dedicated to public health and empowering lives through immunization. We represent diverse experiences and backgrounds which strengthens our team and mirrors the healthcare communities we engage.

Join the engine of Sanofi’s mission — where deep immunoscience meets bold, AI-powered research. In R&D, you’ll drive breakthroughs that could turn the impossible into possible for millions.

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:

Medical Science Liaisons (MSLs) engage with healthcare professionals, institutions, and payers, in a non-promotional manner, to identify and address their needs. MSLs use their scientific expertise to communicate and form partnerships to deliver the Medical strategy, capture actionable insights and ultimately improve patient pathways and outcomes.

External Stakeholder Engagement (70%)

  • Build and develop enduring peer-to-peer relationships with healthcare professionals, institutions and payers through scientific engagement and exchange.

  • Communicate science and collaborate effectively with stakeholders to positively shape patient care.

  • Understand KOL perspectives and needs to adapt and be relevant and valued by the stakeholder.

  • Act as partners to identify areas of mutual collaboration and contribute to the development and implementation of strategic field medical engagement plans aligned to the CMP.

  • Communicate in an accurate, fair, and balanced manner, the benefits, risks, appropriate use, and clinical of the Vaccine portfolio.

  • Generate and share actionable and valuable insights then propose solutions in a timely manner, utilizing appropriate tools available.

  • Gather data, facts, and observations on the external healthcare environment to generate internal insights.

  • Operate independently to develop healthcare networks and navigate the complex healthcare environments at national, regional, and local levels.

  • Territory: All of New Jersey, Delaware, and the eastern half of Pennsylvania (with a focus on the Philadelphia area)

Internal Communication/Collaboration (15%)

  • Work closely with office and field based medical teams to shape, develop, and co-execute the CMP.

  • Develop and maintain an internal stakeholder network.

  • Provide scientific and technical support towards material development for internal and external stakeholders, where applicable and aligned with relevant policies.

  • Provide scientific support for internal functions such as commercial, market access, regulatory/PV, and R&D regarding scientific trainings and updates.

Data Generation (10%)

  • Identify potential data sources and develop partnerships for clinical studies (i.e., real-world evidence, IIS)

  • Support data generation and identify opportunities for further data collection by:

  • Engaging with clinical investigators to support company sponsored trials.

  • Supporting investigator sponsored studies, either clinical or investigator-led, in a compliant manner

  • Support real-world evidence (RWE) development according to local needs.

Internal Training and Education (5%)

  • Complete MSL onboarding and certification program

  • Complete all MSL SOP trainings and all other corporate assigned compliance trainings.

  • Commit to applying and continued practice of the Scientific Engagement Model and Insights process.

  • Continue to develop and maintain technical therapy area and soft skills.

  • Create individual development plan aligned with career aspirations.

About You

Education/Experience/Certification - Basic Qualifications:

  • Advanced degree in Medical, scientific, or pharmacy field (MD, PhD, PharmD)

  • Minimum 1-year previous MSL experience and/or clinical / industry experience required.

  • Strong communication and presentation skills to simplify complex topics, good negotiation and networking skills including familiarity with multi-channel tools and ability to communicate via digital channels from remote environment.

Preferred Qualifications:

  • Good understanding or prior experience in clinical development and clinical research with ability to critically evaluate clinical study protocols, reports, and publications.

  • Candidate Requirement: Must reside in proximity to Philadelphia or within New Jersey

Competencies that the successful candidate should possess:

  • Possess in-depth knowledge of the disease state, therapeutic area, relevant products in the Vaccine portfolio and pipeline.

  • Good knowledge of pharmacovigilance and local regulatory process and its impact on the Vaccine portfolio

  • Strong business acumen, understanding importance of and being able to build strategic plans and implement Medical initiatives.

  • Seen as role model, upholding integrity and ethics values and adhering to high standards

Preferred Qualifications:

  • Good understanding or prior experience in clinical development and clinical research with ability to critically evaluate clinical study protocols, reports, and publications.

  • Candidate Requirement: Must reside in proximity to Philadelphia or within New Jersey

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.
  • Be part of a pioneering biopharma company that engages patients early in drug development and uses their insights to design studies that reflect real-world needs.
  • Help improve the lives of millions of people globally by making drug development quicker and more effective.
  • Work at the forefront of drug discovery, harnessing cutting-edge AI, data, and digital platforms to push the boundaries of science.


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:

$146,250.00 - $211,250.00

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.