In 2017, after assistant roles with the Rabbitohs and Sharks, Carr was appointed as head coach of the Rabbitohs Under-20s team.[14]
In 2018, Carr was appointed as head coach of Mounties, who were a Canberra Raiders feeder club at the time. In his first season, Carr guided Mounties to the top 8, being knocked out in week two by Newtown.[15][16]
In 2019, Carr was hired to coach the Featherstone Rovers in the Championship in England. Carr had a successful season with Featherstone, guiding them 5th place and making the semi finals. Featherstone won three straight semi finals in a row, guiding them to a final promotion play-off with the Toronto Wolfpack, ultimately losing.[17][18][19]
On 11 September 2022, Carr joined the St. George Illawarra Dragons as an assistant to head coach Anthony Griffin.[22] On 16 May 2023, Carr was named as interim coach of the Dragons, following the departure 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.[24]