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Principal Scientist, LNP Drug Product Characterization (Biophysics and Analytics) - Vaccines

Waltham, Massachusetts Salary Range   USD 122,250.00 - 176,583.33
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Every day, 2.5 million Sanofi vaccine doses reach patients worldwide - powered by bold ideas, cutting-edge science, and passionate people like you. Across every stage — from discovery to delivery — Sanofians are shaping the future of vaccines. In global R&D hubs, exceptional offices, and state-of-the-art manufacturing sites, we’re reimagining what’s possible. But science alone isn’t enough — it’s the extraordinary minds behind it that truly make the difference.

Job title: Principal Scientist, LNP Drug Product Characterization (Biophysics and Analytical) - Vaccines

Location: Waltham, MA


In the race for the future of health– The Sanofi mRNA Center of Excellence (CoE)

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 industry, creating new opportunities and risks, we believe the acceleration of innovation with mRNA technology means vaccines and treatments for more people faster than before.

That’s why we’re looking for bold, optimistic world-changers to join our mRNA Center of Excellence. We’re investing €400m a year into the new Center, hiring a team of 450 dedicated employees, and focusing on implementing an integrated end-to-end mRNA vaccine capabilities and research with R&D, digital and CMC teams.

Bring your ambition and optimism and join us on our journey to discover and deliver transformative medicine to patients through the advancement of our cutting-edge mRNA technology!

As the Principal Scientist within the Drug Product Platform and Early Clinical Development Team, you will provide hands-on leadership to a small team focusing on LNP analytics to characterize LNP Drug Products. The Principal Scientist will be responsible for method transfer of core LNP characterization methods from Analytical Sciences, establishing and training team, and building strong relationships with Analytical Science, and Lab Team Leaders/Unit Heads within the DP Development team to ensure robust analytical results are generated to help drive LNP formulation and process development initiatives. The Principal Scientist will need a deep scientific understanding of biophysical characterization methods, and the use of chromatographic and spectroscopic techniques to support the development of new LNP formulations for the CMC team in the mRNA Center of Excellence with the ultimate goal of to contribute to Sanofi’s goals of bringing innovative new mRNA vaccines to the market. This role will work across multiple teams and functions (CMC Drug Product Development, Analytical Science, Research Formulation and Delivery, and CMC Regulatory) and potentially different stages of drug product development to seek innovation in biophysics-related characterization and support project development, including troubleshooting and automation.

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.​

Main Responsibilities:

  • Build/Lead a team (1-2 contractors) to meet the biophysical characterization and analytical needs of the DP Platform and Early Clinical Development Team.

  • Act as the team’s liaison to Analytical Science and build strong working relationships with key stakeholders to ensure methods are fully aligned between the two teams and swiftly implement necessary changes/improvements.

  • Develop a robust sample testing strategy, including sample tracking, data reporting, and iLab integration.

  • Represent Drug Product Platform and Early Clinical Development team and collaborate cross-functionally in the design, development, and execution of biophysical characterization studies to enable the development of a new LNP platform.

  • Supervise and mentor junior scientists for LNP drug product characterizations and manage the operation of analytical requests within the Platform and Early Clinical Development team.

  • Provide scientific insights through the lens of biophysical science (particle size measurement, zeta potential determination, particle morphology, internal structure determination, lipid fluidity, and nucleic acid-lipid interaction), and chromatography analysis to support the development of new-generation LNP vaccines, including considering the vaccines' thermostability, potency, and manufacturing process.

  • Support the technology transfer of drug product formulation and process to toxicology batch and pilot scale as needed.

  • Represent function in cross-functional and strategic teams engaged in novel mRNA vaccine development.

  • Analyze, interpret, and summarize results in technical reports and presentations.

  • Stay current with the literature on biophysical characterization and analytical techniques related to lipid nanoparticles and provide management with related equipment recommendations.

  • Provides training, technical oversight, and strategic guidance to junior team members.

The duties of this role are conducted in a lab environment. Experience with electronic record keeping and data software, like electronic lab notebooks, EndNote, maintenance of laboratory instrumentation (organizing preventative maintenance, data backup, software upgrade, etc.), as well as GraphPad, Visio, JMP/Minitab, and Adobe Pro, would be an advantage.

About You

  • Earned Ph.D. in Biophysics, Physics, Chemical Engineering, Pharmaceutical Science, Chemistry or related sciences with 3+ years of relevant post-doc or/and industry experience.

  • Analytical and formulation knowledge of nucleic acids, lipid biochemistry, formulation stability, and biotherapeutic drug product process development is essential.

  • Strong preference for experience and knowledge in biophysics and advanced biophysical characterization of lipid nanoparticles or other lipid-based nanoparticle drug delivery systems.

  • Experience reading and interpreting scientific data, as well as oversight of the collection and storage of data is highly preferred.

  • Firsthand experience in analytical tools, such as SEC, FFF-MALS, DLS, HPLC, RP-IP, AEX, AUC, microscopy, particle size tracking, and MFI, is preferred.

  • Experience in studies/data interpretation of Isothermal calorimetry, SAXS, SANS, and NMR is desirable.

  • Experience in fluorescence microscopy, single particle tracking, and quartz crystal microbalance with dissipation (QCM-D) is a plus.

  • Hands-on experience with lipid-based nanoparticle systems and mRNA-based product development is highly desirable.

  • Experience leading teams, mentoring others, training or other leadership roles is ideal.

  • Desire to work in a fast-paced environment. 

  • Excellent organizational and communication skills 

  • Strong analytical and problem-solving skills  

  • A strong ability to communicate scientific topics in writing and presentations.

  • The individual must work in a collaborative setting, and the ability to adhere to timelines is essential.

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.

#GD-SP ​
#LI-SP    

#LI-Onsite
#vhd

#mRNA

All compensation will be determined commensurate with demonstrated experience. Employees may be eligible to participate in Company employee benefit programs, and additional benefits information can be found here.

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Why work with us

  • We’re problem-solvers and pioneers. United by the belief that everyone deserves a healthier future. We create best-in-class vaccines that prevent disease and protect lives.

  • Innovation drives us. From AI and mRNA to next-gen science, we push the boundaries to deliver first- and best-in-class vaccines for infectious diseases worldwide.

  • Growth happens here. With bold investments in R&D and world-class facilities, Sanofians across the entire vaccine lifecycle are shaping the future of global health.

  • We do what’s right. Sustainability and DE&I drive our positive global impact—because the diverse communities Sanofians represent are the patients we serve.

What does it take to protect the world from disease?

For over a century, we’ve been pioneering breakthroughs that help protect millions from diseases like polio, influenza, RSV, and more. And we’re not stopping there.

Powered by groundbreaking technologies - mRNA platforms, recombinant proteins, and AI-driven insights - we’re pushing the boundaries of science.

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"I’m immensely proud of the pace of our innovation – the urgency by which our teams are working to transform the practice of medicine."

Thomas Triomphe

Executive Vice President, Vaccines

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Sanofi’s mRNA Center of Excellence

Step into the future of healthcare with Sanofi’s mRNA Center of Excellence. Discover how a global team is transforming medicine with cutting-edge mRNA technology – and explore the skills, inspirations, and breakthroughs driving this revolution. Ready to shape the future?

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About Sanofi Vaccines

Explore our commitment to protecting global health through the power of vaccines. We’re building healthier communities with innovative solutions that save millions of lives each year. Dive into the future of vaccines, discover the diseases we’re tackling, and learn why vaccination is critical at every stage of life.

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