Martyn Andrew Grimley (born 24 January 1963) is a former field hockey player, who won a gold medal with the British Olympic squad at the 1988 Summer Olympics in Seoul. He also has World Cup silver medals for both indoor and outdoor hockey as well as a European Cup silver medal. He has a combined total of 178 international caps for Great Britain and England.
He taught Physical Education at Banbury School in Oxfordshire for a short time between 1986–87 and then taught Geography, Physical Education and Outdoor Education while at Dulwich College (London). Since returning from the Olympics in 1988 he joined Zurich Financial Services (UK) and has since become a company director running a successful financial services business based in Cheshire called Lee, Warriner & Co Ltd.
He is life member of Brooklands Manchester University Hockey Club.