For more than 15 years, Dr. Zumrick was a diving medical officer with the USN and the Experimental Diving Unit in Panama City, Fl. As Senior Medical Officer he planned and directed testing of diving procedures, and equipment for the US Navy. He has performed extensive research in diving related hypothermia, oxygen toxocity, mixed gas diving, and saturation diving procedures. He has participated on various experimental saturation dives in excess of 1500 fsw. Additional he has performed extensive evaluations on diving equipment including various types of closed and semi-closed circuit rebreathers.
He became interested in cave diving in 1970 and has done extensive exploration in underwater caves over the eastern United States, Mexico, and the Carribean. A veteran of over 2000 cave dives, he has been involved in numerous underwater mapping projects, including the U.S. Deep Caving Team's massive dry-cave and sump-diving expedition to Sistema Huautla in Mexico in 1984. Dr. Zumrick has been an NSS-CDS Cave diving Instructor since the beginning of the program (now emeritus), and has served as chairman of the NSS-CDS, as well as Editor of Underwater Speleology, the bimonthly journal of the NSS-CDS. Directly as a result of his explorations Dr. Zumrick was elected a Fellow of the Explorers Club.
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