Mark A. Gresham

Mark A. Gresham is the owner of Professional Scuba Inspectors. He has spent many years developing his knowledge of cylinders and cylinder safety. His knowledge of cylinders is considered by many to be the best in the industry. He has maintained and written material on cylinder inspection and supporting specialties that is used today by many entities including NASA, NOAA, the US Military, Police, Fire Service, Hydro Facilities and Dive Shops around the world.