Justin Holbrook (born 13 January 1976) is a former halfback in the NRL and the current Assistant Coach at the Sydney Roosters. Holbrook played for the Knights, Panthers and Roosters during his career. After finishing his playing career, Holbrook moved into coaching.
His previous coaching experience includes working with the Canterbury Bulldogs NSW Cup side, St George Illawarra’s NYC side and prior to being hired by the Roosters, was the head coach of the Parramatta Eels NYC team.
In 2014, under the leadership of Holbrook, the Eels were one of the most improved teams in the competition, narrowly missing out on a grand final appearance after finishing 14th in 2013.