Dr. Linden has specialized in hyperbaric medicine for over 20 years. A graduate of the University of Toronto, he also maintains a successful family practice. Dr. Linden is a member of the Undersea & Hyperbaric Medical Society and president of the Great Lakes Chapter.
Dr. Linden is a staff physician in the Hyperbaric Unit of the Toronto General Hospital, a lecturer in the Faculty of Medicine, University of Toronto and is the medical consultant and lecturer for Seneca College’s Commercial Diving Program.
Dr. Linden has published numerous articles on hyperbaric medicine. He is a highly sought after consultant and lecturer on the subject of Diving & Hyperbaric medicine to professional and recreational diving associations.

Mr. Necpal has many years of diverse experience in diving and hyperbaric medical technology. He started as a deep-sea commercial diver with Oceaneering International in 1977. Over the last 30 years he has worked as a diver, operator and trainer for one of the world's deepest (1700 msw) diving research complexes at DRDC Toronto (formerly DCIEM). In 1993 he joined the Hyperbaric Medicine Unit at the Toronto General Hospital on part-time basis as a hyperbaric chamber controller and since 2004 became the Hyperbaric Safety Director.
Mr. Necpal is an Associate member of the Undersea & Hyperbaric Medical Society. In 1993 he became a Certified Hyperbaric Technologist (with distinction) through the National Board of Diving and Hyperbaric Medical Technology. Over the years he has attended a number of diving and hyperbaric safety related courses.
Mr. Necpal also holds a locum position of a Hyperbaric Safety Officer in Bermuda, at the King William VII Memorial Hospital.