Glen Warwick Jackson (born 23 October 1975 in Feilding, New Zealand) is a professional full-time referee for New Zealand Rugby. Jackson is also a former New Zealand rugby union player. During his playing career, he was a first five-eighth. Domestically, he represented Bay of Plenty and Waikato in the NPC and the Saracens in the UK's Guinness Premiership. His strong performances saw him named in the Chiefs squad for the 1999 Super Rugby season and had international experience as well with New Zealand Māori (now known as the Māori All Blacks) and the Barbarians.