Our Board of Directors

Yosef Krespi, MD, FACS

Chairman of the Board of Directors

Yosef Krespi, MD, FACS - ZelegentDr. Krespi is a board certified otolaryngologist specializing in head and neck surgery at Northwell – Lenox Hill Hospital and Professor of Clinical Otolaryngology at Columbia University College of Physicians and Surgeons. Dr. Krespi graduated from medical school at Technion in Israel and completed his residency training at Mount Sinai Medical Center in New York. After his fellowship at Mount Sinai, he served as Associate Professor at Northwestern University Medical School in Chicago. He was Professor and Chairman of Otolaryngology at SUNY-Health Science Center in Brooklyn and Chairman at St. Lukes-Roosevelt Hospital. Dr. Krespi has published over 160 scientific medical articles, and has served as editor on four textbooks and written over 60 book chapters. He is one of the world’s leading experts in laser surgery, endoscopic sinus surgery, surgery to relieve snoring and sleep apnea, and oral malodor. Dr. Krespi is nationally and internationally recognized for his expertise and has received numerous awards and honors in his field.

David O. Volpi, MD, FACS


David Volpi, MD - ZelegentDr. Volpi is a board certified otolaryngologist specializing in head and neck surgery. He is a Fellow of the American College of Surgeons and an active member of professional organizations including the American Academy of Sleep Medicine, the American Medical Association, the Medical Society of the State of New York, the New York County Medical Society, the American Academy of Otolaryngology — Head and Neck Surgery, the American Academy of Facial Plastic and Reconstructive Surgeons, and the American Rhinologic Society. Dr. Volpi is one of New York City’s foremost snoring specialists and the founder of eos sleep, formerly the Manhattan Snoring and Sleep Center. As an ear, nose and throat surgeon in private practice for more than twenty years, he has provided expert care for the full range of ENT disorders and diseases, with a specialty in snoring and sleep apnea treatment.

Alexander K. Arrow, MD, CFA

Chief Executive Officer and Director

Dr. Alexander Arrow - ZelegentDr. Arrow came to Zelegent, Inc. from Biolase, Inc. (NASDAQ: BIOL), the world’s lead manufacturer of dental lasers, where he served as a President and Chief Operating Officer, a Director, and Chair of the Audit and Compensation committees of the Board of Directors. Prior to Biolase, Dr. Arrow was the Chief Medical Officer of Stanford-affiliated neuroscience company Circuit Therapeutics, Inc., and prior to that he spent five years as the Chief Financial Officer of cardiovascular device manufacturer Arstasis, Inc. Before entering medical device manufacturer operating roles, Dr. Arrow spent nine years running medical technology equity research at three Wall Street firms, the last five years at Lazard. He also served as the Chief Financial Officer of the Patent & License Exchange, Inc. He has a medical degree from Harvard Medical School and began his surgical residency at the UCLA Medical Center before leaving clinical practice to go into business.

Rui Avelar, MD


Rui Avelar - ZelegentDr. Avelar is the Chief Medical Officer for ALPHAEON®. He brings extensive experience in both clinical and industry roles – in devices, pharmaceuticals, drug-device combinations and biologics. Dr. Avelar received his medical degree from the University of Toronto and subsequently completed training accreditation in sports medicine from the Canadian Academy of Sports Medicine. After his medical education, Dr. Avelar spent 20 years in private practice in sports medicine in Vancouver, including consulting for a number of Canadian National Teams and serving as the team physician for the NHL’s Vancouver Canucks for over ten years. After his clinical practice, Dr. Avelar began his business career as a Wall Street buyside and sellside medical technology equity analyst. He then spent ten years at Angiotech Pharmaceuticals, Inc., initially as the VP of Investor Relations, then as the Chief Medical Officer, in charge of Regulatory, Clinical Operations, Clinical Development, Medical Affairs, Medical Writing, Statistics, Safety and Quality. He then served as the Chief Medical Officer for Allergan Medical for three years, with Clinical Development, Clinical Operations, Safety, Medical Writing, Statistics and Regulatory all reporting to him.