Gregg learned to dive in 1975 at the age of 14.  He has been diving in  Southern California, and the Caribbean but the majority of his dives have been in the North Atlantic.  He was a diver at the National Aquarium of Baltimore from 1990-93.  He has taught at NDC since becoming an instructor in 1991 and he is a Master Scuba Diver Trainer.  His favorite dive destination are the ship wrecks off North Carolina.