About us | Mezzion

About us

Delivering hope where there was none before

Our vision

Mezzion Pharmaceuticals continuously strive to discover, develop and deliver new hope in areas of medicine where there was none before. With our extensive experience in drug development and clinical trials, and our strong conviction and compassion for everything we do, we know that our vision of a future where no patient with a rare disease is without hope is firmly within our grasp.

Meet our Leadership Team

James L. Yeager, RPh, PhD

James L. Yeager, RPh, PhD

Dr. Yeager is an Executive Director at Mezzion Pharma Co. Ltd and has over 40 years ofworking in the pharmaceutical industry in research and management positions.

Jefferson J. Gregory, B.S. Pharm., J.D., H.D.

Jefferson J. Gregory, BS Pharm, JD, HD Advisor

Jefferson graduated from the University of Maryland in 1979 with a BS degree in Pharmacy, and from the University of Maryland in 1985 with a Juris Doctorate Degree. Along with his brothers, Jefferson founded King Pharmaceuticals, Inc. in December 1993. Jefferson served as President of King and served on its Board of Directors. He was appointed Chief Executive Officer in January 2002 and served as Chairman of the Board from June 2002 until his retirement in May 2004.Currently, Jefferson serves as the Vice Chairman of Gregory Pharmaceutical Holdings, Inc.; as Executive Chairman of Nutrition and Fitness, Inc.; and is Managing Director of his private family investment firm, Gracetree Investments, LLC.

Dean Park CEO

Dean Park CEO

Dean is the Founder of Mezzion Pharma Co. Ltd. and also serves as its Chief Executive Officer. Dean also founded and served as Chief Executive Officer and/or President of a number of other successful international companies, including AIA Capital Korea, Far East Investment, Hutchison Corporate Access and Ricco Nine. Dean has previously served as Vice President and Director of the investment banking group at Merrill Lynch Capital Markets.

Our Scientific Advisory Board

Dr. David Goldberg

  • Attending Cardiologist and Director of the Exercise Physiology Laboratory at Children’s Hospital of Philadelphia
  • MD at UMDNJ-Robert Wood Johnson Medical School

Dr. Jack Rychik

  • Director of the Fetal Heart Program and the Single Ventricle Survivorship Program at Children’s Hospital of Philadelphia
  • MD at State University of New York, Downstate Medical Center

Dr. Steven Paridon

  • Attending Cardiologist and Director of the Exercise Physiology Laboratory at Children’s Hospital of Philadelphia
  • MD at Case Western Reserve University School of Medicine

Dr. Bryan Goldstein

  • Associate Director at the Cardiac Catheterization Laboratory at Cincinnati Children’s Hospital Medical Center
  • MD at Boston University School of Medicine


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