In the 2013–14 season Corica became Head Coach of the Sydney FC National Youth League once again guiding them to the Championship in a stellar season. He continued in this role in 2014–15 but towards the end of the NYL season in which Sydney FC finished fourth he was drafted into the role of Assistant Coach to Graham Arnold with the Sydney FC A-League team where they finished runners up in the Premiership and Grand Final. From 2015 to May 2018, Corica continued as the Assistant Coach to Graham Arnold on a full-time basis.