[14] In 2018, Carr was appointed as head coach of Mounties, who were a Canberra Raiders feeder club at the time.
[17][18][19] In 2020, Carr returned to Australia, joining the Parramatta Eels as their NSW Cup head coach.
[20] Halfway through the 2022 season, after the departure of David Kidwell to the Argentina rugby union team, Carr was elevated to assistant NRL coach under Brad Arthur.
[21] On 11 September 2022, Carr joined the St. George Illawarra Dragons as an assistant to head coach Anthony Griffin.
[23] In Round 12 of the 2023 NRL season, he won his first game in charge of the club, a 24–22 victory of the Sydney Roosters.