Mark had his first experience of diving at the age of 10 when he did a try-dive in a local pool. He was hooked from that point onwards. He learnt to dive in 1987 and has been diving ever since. Mark became an instructor in 1994 and has been actively instructing since then. In 2002, Mark set up Dive-Tech, a dedicated technical diving facility, with the intention of providing the highest quality technical diving training. Dive-Tech provides technical training at all levels up to and including CCR Advanced Mixed Gas Instructor Trainer. Mark is a TDI/SDI Instructor Trainer and a member of TDI/SDI’s Global Training Advisor Panel. He also represents TDI/SDI on a number of international standards groups. He is a regular contributor to a number of diving magazines, the author of “Deco for Divers,” and “Technical Diving: An Introduction,” and a regular speaker at diving conferences around the world.