Derek Walker

Derek John Walker (born 23 November 1959) is a New Zealand cricket umpire and former cricketer. He was a member of the International Panel of Umpires and Referees until June 2016, when he was demoted to New Zealand's national panel.

Walker was born at Dunedin in 1959. He played for Otago age-group sides from the 1979–80 season before playing in England for Nottinghamshire County Cricket Club's Second XI during the 1980 season and making his senior debut for Otago at the end of December 1980. Described as "one of the regulars in the Otago team during the 1980s", he played 71 senior matches for the provincial side as an all-rounder, scoring 1,562 first-class runs and taking 19 wickets.

As well as playing in New Zealand, Walker played English league cricket for 20 seasons and has umpired at men's and women's international level. He has stood in over 100 first-class matches, List A and Twenty20 cricket matches in New Zealand. He was named New Zealand domestic cricket's umpire of the year in 2020.