Corey then served as head coach of the Omaha Mustangs, a defensive coach at the collegiate level for the University of Miami and Utah State University, for the Chiefs, Cleveland Browns, Buffalo Bills, and New Orleans Saints of the NFL, as well as the Memphis Maniax of the XFL.

[3] Undrafted in the 1960 NFL draft,[3][4] Corey signed as a rookie free agent with the Dallas Texans of the American Football League (AFL).

[1] Corey signed with the Dallas Texans (now Kansas City Chiefs) as undrafted free agent.

Corey was hired as the head coach with the Omaha Mustangs of the Professional Football League of America.

[7] Before the 1967 season, he was hired to the defensive coaching staff for Utah State University in Logan.

[9] Corey was hired to be the Miami Hurricanes' defensive coordinator in 1970,[10] and to coach the offensive backfield in 1971.