Meet Leonard S. Schleifer, MD, PhD, Regeneron COO

Bio, work history, education & how to reach out.

Leonard S. Schleifer, MD, PhD

Job Title

COO at Regeneron

Contact Information

*******@regeneron.com

+1 **********

Last updated: 2026-03-03

Who is Leonard S. Schleifer, MD, PhD?

Leonard S. Schleifer, MD, PhD, is the co-chair, president, and CEO of Regeneron Pharmaceuticals. He has been a key figure in the biotech industry since founding Regeneron in 1988, focusing on innovative medicines and scientific research.

Leonard S. Schleifer, MD, PhD's Work History

Leonard Schleifer has built and managed Regeneron since 1988, leading its mission to develop science-driven treatments. He is a physician-scientist with a background in neurology and pharmacology, dedicated to transforming healthcare through biotechnology.

  • 1988-01-07 — Co-Founder, President, and Chief Executive Officer, Regeneron Pharmaceuticals

Leonard S. Schleifer, MD, PhD's Education

Leonard Schleifer earned his MD and PhD in pharmacology from the University of Virginia and has been a clinical professor at Cornell Medical College.

  • University of Virginia — MD and PhD in Pharmacology
  • Cornell University — Bachelor of Arts

How to Reach Leonard S. Schleifer, MD, PhD?

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