Under his management, the Sounders U17s team won the prestigious Generation Adidas Cup in April 2022, and went on to win the MLS Next West division.
In August 1996, he moved to the United States after accepting an offer to become the assistant director of coaching for Phoenix-based Sereno SC.
[9] On 15 August 2017, the Rapids announced that they had parted ways with Mastroeni and named Steve Cooke the interim head coach until the end of the 2017 season.
[10] In December 2017, however, it was announced that Cooke had been appointed as the head coach and technical director of USL Championship side OKC Energy FC.
[2] He served as the Energy's head coach for the 2018 and 2019 seasons,[11][12] He also led the team to the fourth round of the 2019 U.S. Open Cup.
As part of his duties, he helped launch the team's first professional academy program in March 2020[15] and made the club one of the founding members of Major League Soccer's elite player development platform,[16] known as MLS Next.
[17] In May 2021 it was announced that Cooke had left Phoenix Rising and would join Seattle Sounders FC of Major League Soccer as the U17 head coach in the academy.
Cooke was soon promoted to the role of academy director but continued to be the U17 head coach until the end of the 2021/2022 season.
That season was very successful for Sounders FC, under Cooke's guidance, as the team lifted the highly prestigious Generation Adidas Cup in April 2022, by beating Tigres of Mexico 2–0 in the final.