He has certified thousands of students into the scuba diving world since he became a NAUI Instructor in 1961. He is a major contributor to each edition of the NOAA Diving Manual. He has published 5 editions of the book Inspecting Cylinders, which is recognised as the authority on high-pressure cylinder inspection. He is also credited with developing standards for scuba cylinder inspection and safety. Mr. High now has the recognition of the ISDHF to go along with his three NOGI awards.