
Manufacturing and Supply
Where the
miracles of
science are made
a reality for patients
Molecular Biology Scientist- Vaccines
At a glance
Our teams produce and deliver over 4 billion units of medicines and vaccines every year, ensuring every breakthrough gets to the people who need it most.
Our state-of-the-art facilities, AI-powered smart factories, and cutting-edge automation are redefining what’s possible: ensuring treatments reach patients faster, safer, and more sustainably than ever before. This is where your skills, ambition, and passion can shape the future of healthcare.
Job Title: Molecular Biology Scientist- Vaccines
Location: Swiftwater, PA
About the Job
We deliver 4.3 billion healthcare solutions to people every year, thanks to the flawless planning and meticulous eye for detail of our Manufacturing & Supply teams. With your talent and ambition, we can do even more to protect people from infectious diseases and bring hope to patients and their families.
The Upstream Process Development group as a part of Manufacturing Sciences, Analytics and Technologies department supports several projects including:
Generation of recombinant baculovirus working virus banks (seeds) for manufacturing of seasonal influenza Flublok and COVID vaccines
Upstream process development at small and mid scales
Process tech transfer and yield improvement
Manufacturing support
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:
Scientist in Recombinant Working Virus Banks Generation Group
Key Responsibilities
Perform routine molecular biology tasks such as primer design, DNA construct design, PCR amplification, cloning, plasmid purification, DNA purification, restriction endonuclease digest, DNA sequencing and analysis, bioinformatics analysis of the sequences from different databases
Design, analyze and document experiments, maintain proper records electronically and in lab notebooks
Effectively communicate results in group and department meetings
Contribute to lab organization, reagent tracking and ordering
Ensure that work performed is conducted in a safe and compliant manner in adherence with SOPs/SWIs and protocols
Coordinate data capture and tracking information
Write and review protocols and reports
Serve as Molecular Biology SME to tech transfer and manufacturing support
About You
Qualification
BS/MS in Molecular Biology, Chemical Engineering, Biochemical Engineering, Biochemistry, Biotechnology, or other relevant disciplines
0 -1 years of experience with BS degree working in academic or industry.
Hands on experience in molecular biology with previous experience in Site Directed Mutagenesis, Gibson assembly, seamless cloning procedures
Experience with purification of DNA from baculoviruses
Familiarity with Restriction Fragment Length Polymorphism (RFLP) and Femto Pulse experiments is a plus
Experience in baculovirus protein expression system and insect cell cultures is highly desirable
Contribute to lab organization, reagent tracking and ordering
Hands-on experience in DNA sequence analysis, construct design using SnapGene, or similar software is a plus
Ability to plan and conduct laboratory experiments, evaluate, and interpret data
Ability to work within team environment and multitasking is a plus
Strong written and verbal communication skills
Detail-oriented and ability to prioritize assignments
Ability to work with minimum supervision
Experience in cell culture procedures and associated aseptic techniques is a plus
Fluent in both written and spoken English
Strong experience in Microsoft Excel, Word and Power Point is important
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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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.
Pursue Progress. Discover Extraordinary.
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. You can be one of those people. Chasing change, embracing new ideas and exploring all the opportunities we have to offer. Let’s pursue progress. And let’s 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, or gender identity.
Watch 'One day at Sanofi' and check out our Diversity Equity and Inclusion initiatives at sanofi.com
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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.
All-in on diversity
At Sanofi, diverse perspectives fuel the best solutions for patients. Hear from Monique Vessey, our Supply Chain Transformation Leader, on how her background shapes her approach to delivering life-changing medicines.

"Manufacturing and Supply is the bridge between the science that happens in research laboratories and the people and communities we serve."

Brendan O’Callaghan
Executive Vice President of Manufacturing and Supply
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