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Thomas M.
Leiden is currently serving as Secretary & Trustee at Cleveland Zoological Society.
Previously, he worked as President & Chief Executive Officer at The Leiden Cabinet Co.

Leiden Dworak is currently working as the Principal Accounting Officer at TScan Therapeutics, Inc. since 2023.
Previously, Leiden held the position of Director at Moderna, Inc. and VP, Head-Finance Planning & Analysis at Avrobio,.
Inc. Leiden completed an MBA from Indiana University.

Jeffrey M. Leiden is a businessperson who founded CardioGene Therapeutics, Inc. and who has been at the head of 11 different companies. Dr. Leiden occupies the position of Executive Chairman of Vertex Pharmaceuticals, Inc., Non-Executive Chairman at Tmunity Therapeutics, Inc., Chairman at PathAI, Inc., Chairman for Casana Care, Inc. and Chairman of Revolution Healthcare Acquisition Corp. He is also Member of American Academy of Arts & Sciences, Member of Institute of Medicine, Member of Association of American Physicians, Member of American Society of Clinical Investigation and Member of National Academy of Medicine of United States and on the board of 6 other companies. In the past Dr. Leiden was Chairman at Lycera Corp., President & Chief Operating Officer of Abbott Laboratories, Chairman of TYRX, Inc., Chairman at Variation Biotechnologies (US), Inc., Managing Director at Clarus Ventures LLC, President & Chief Operating Officer at Pharmaceutical Products, Member of National Heart, Lung & Blood Institute, Chief Cardiology Officer at The University of Chicago, Professor at Harvard Medical School and Professor-Biological Sciences at Harvard T.H. Chan School of Public Health. He received a doctorate and an undergraduate degree from The University of Chicago.