
R&D
Where your curiosity drives the
miracles of
science
Staff Scientist- Protein Sciences
At a glance
Bring your curiosity to a team where deep immunoscience meets cutting-edge innovation. Across oncology, rare diseases, neurology, and vaccines, you’ll work at the intersection of lab science and AI-powered discovery — all while collaborating across boundaries to turn breakthrough ideas into real-world impact. Whether you want to deepen your scientific expertise or grow as a leader, you’ll find the opportunity here.
Job Title: Staff Scientist- Protein Sciences
Location: Cambridge, MA
About the Job
Are you ready to shape the future of medicine? The race is on to speed up drug discovery and development to find answers for patients and their families. Your skills could be critical in helping our teams accelerate progress.
Sanofi Intrépide Research Laboratories is a new initiative designed to identify, incubate, validate and advance science, technology and business opportunities that are deemed to be crucial for Sanofi’s near-, mid- and long-term pipeline strategy. It has a global presence, China and US. For our US operations, it consists of the Intrépide Core Team, offering strategic, scientific, technological and operational support, and several Research Laboratories, focusing on science and executing breakthrough projects.
We are seeking a highly motivated candidate to join us as a staff scientist to provide protein chemistry support to all Intrépide research labs. The lab-based candidate will be responsible for production and analysis of protein tools and therapeutic candidates. They will work closely with lab heads and the head of planning and implementation to advance Intrépide’s mission. Success in this position requires independence, an innate sense of urgency, and strong expertise in protein characterization. The position is located in Cambridge, Massachusetts.
We are an innovative global healthcare company with one purpose: to chase the miracles of science to improve people’s lives. We’re also a company where you can flourish and grow your career, with countless opportunities to explore, make connections with people, and stretch the limits of what you thought was possible. Ready to get started?
Main Responsibilities:
Express, purify and characterize recombinant antibodies and proteins from mammalian expression systems
Develop and conduct biophysical and functional assays to validate the various protein designs
Analyze, integrate and interpret data from multiple sources
Diligently document work in digital systems and regularly communicate results to lab heads
Coordinate with in-vivo teams to validate concept biologics
Work collaboratively in a team environment and manage priorities to achieve our goals
Work with internal stakeholders, and external partners and CROs
About You
Minimum qualifications
PhD in a scientific discipline plus minimum 3 years of relevant research experience, OR Master’s Degree plus minimum 5 years of relevant research experience, OR Bachelor’s Degree plus minimum 8 years of relevant research experience.
Relevant research experience must be in a drug discovery industry setting.
A degree in Biochemistry, Biology or Biotechnology is preferred
Preferred qualifications:
Experience in protein expression using both HEK and CHO systems and their derivatives, in shake flask and bioreactor formats
Experience in protein purification using AKTA systems and Unicorn software
Experience in plate based functional assays (ELISA/MSD, chromogenic/fluorescent readouts, etc.)
Expertise in protein interaction studies using label-free methods (Biacore, Octet) and biophysical characterization of protein (SEC-MALS, DLS)
Ability to work independently with minimal supervision
Excellent organization, communication, presentation, and interpersonal skills
A creative, problem-solving, collaborative, and goal-oriented mindset
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.
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, protected veteran status or other characteristics protected by law.
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
- Expand your horizons. Grow through curiosity, with support to move, learn, and lead in a culture that champions mentorship, mobility, and bold development.
- Accelerate results with technology. Harness the power of AI and automation to push scientific boundaries and reimagine what's possible in drug discovery.
- Impact through inclusive innovation. Help deliver better science and fairer outcomes by driving inclusive research that reaches more people, in more meaningful ways.
- Turn patient needs into breakthrough science. Drive scientific breakthroughs that start with patient needs—and end in treatments that change lives.
Meet Nils Libert, Associate Scientist
Meet Nils Libert, an Associate Scientist in Belgium, where he plays a key role in advancing groundbreaking research. Learn how his work helps drive innovation, uncover new scientific possibilities, and contribute to life-changing treatments that impact patients around the world.

"At Sanofi, we are building an R&D engine powered by the best science, digital innovation, and a commitment to transforming the lives of patients around the world."

Houman Ashrafian
EVP & Head of R&D
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