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Dennis Martin (b. 10 April 1947, Liverpool, England) is a security consultant, trainer and the author of Working with Warriors, a 2008 book about how three combat experts took martial arts and applied them to the street. This book concentrates on Gary Spiers, Terry O'Neill and the author.

Dennis Martin started training in Karate in 1965. In 1970 he started working with Terry O’Neill on the door of a Liverpool nightclub. In 1973 he went to Japan and Okinawa to train in Goju-ryu Karate for 6 months. On returning to England in October 73 he was asked to be a bodyguard at the Miss World Contest, specifically providing protection for Miss Israel. This led him to further training and work in the field of VIP Protection. He has worked as a team leader and operator on VIP protection tasks for several Royal families and Diplomatic entities. In 1985 he formed CQB Services, a training company, and offered the first ever commercial close-protection training course in the UK. Together with Lofty Wiseman, he trained bodyguards from Europe, Australia, USA and Africa.

PUBLICATIONS Staff Writer for FIGHTING ARTS INTERNATIONAL Magazine, with the regular On Guard column.

 Regular contributor to the Belgium firearms/adventure magazine FIRE!. 

 Has written for several US magazines, such as SWAT, BLACK BELT, COMBAT HANDGUNS etc. 

Has written on VIP close-protection for the international security magazine INTERSEC.

Wrote the autobiographical Working with Warriors, book [Milo publishers, 2008]

TECHNICAL CONSULTANT Credited as providing technical advice in the following books: "Handgun Stopping Power", by Evan Marshall and Ed Sanow "Defensive Living" by Ed Lovette and Dave Spaulding "No Other Option" by Marcus Wynne "Rain Storm" by Barry Eisler

References: Fighting Arts Magazine, vol 5, issue 6,, 1985; “The Bodyguard Business” Handgunner Magazine, issue 28, May/June 1985, “Bodyguard”