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

Operations Consultant 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.

Robert E. Grant


Robert E. Grant

Mr. Grant is the Founder, Chairman and CEO of Concierge Key Health, the first on-demand app to the world’s elite physician specialists. He is also the Founder and Vice Chairman of ALPHAEON Corporation (a subsidiary of Strathspey Crown Holdings LLC), a leader in the rapidly growing field of Lifestyle Healthcare and based in Irvine, CA. He is concurrently the Chairman and Managing Partner of Strathspey Crown LLC, a growth equity firm based in Newport Beach, CA. He was formerly CEO and President of Bausch and Lomb Surgical in June of 2010. Prior to this, he led Allergan Medical as President from 2006 to 2010. Mr. Grant is an independent Board Director at Myoscience, Inc., Acufocus, Inc. and ReShape Medical, Inc. All are leading lifestyle healthcare companies.  Mr. Grant holds a BA from Brigham Young University and an MBA (with Honors) from Thunderbird, The American Graduate School of International Management.  He has lived and worked in nine countries and speaks Japanese, French, Korean and German fluently.

Michael Stevens,, MD


Mike Stevens has over 25 years experience in sales leadership. As a SVP at Strathspey Crown, he oversees the development of investors relations. Prior to Strathspey Crown, spent two years at Biodent as Senior Vice President of Operations, where he build a dental implant company from the ground floor. In 2018 he was awarded a fellowship award from the Dental Facial Aesthetics Academy. Prior to that, Stevens spent 12 years at Biolase Technology as the Director of Professional Relations where he built long-term professional relationships resulting in a 25% average annual sales revenue increase. He contributed greatly to increased profitability and the overall success of the company. He was also tasked with hiring and training all territory sales reps based on his knowledge of, and success in selling, the company’s products. Stevens is an experienced and highly-motivated professional with a proven record of exceeding goals in direct and indirect sales, leadership, marketing, business operations, customer service, and technical consultation. He was a double major at Washington State University. He maintains active involvement in several community organizations.

Dan “DJ” Sirota


Dan SirotaDJ Sirota is the Vice President for Cook Medical’s MedSurg division, which includes the ENT franchise. He started at Cook as a Critical Care sales representative based in Pittsburgh, Pennsylvania in 1987. While a sales representative, DJ acted as product manager for the Northern Pacific Rim doing business primarily in Japan and Korea. In 2000, he was asked to work in-house at Cook’s Bloomington, Indiana global headquarters as the Critical Care marketing manager. DJ then transitioned to the Peripheral Intervention unit in 2004 where he became a senior product manager, overseeing products that would eventually become the Interventional Radiology product line. In January of 2009, DJ was asked to lead Cook’s newly launched Interventional Radiology business unit. In 2011 he was asked to also lead the Critical Care division. DJ earned his M.B.A from Indiana Wesleyan University.