At the age of 34 years old he took over the reigns of the Pittsburgh Steelers from legend Chuck Noll and kept the Steel City franchise in contention for much of his 15 years as the head coach. From 1980 to 1984 he was a linebacker for both the Browns and the Eagles according to Steelers.com.  He then served as an assistant coach at various positions for the Brown and the Chiefs until the Rooney Family hired him as the face of their franchise in early 1992.

His brilliant coaching career with the Black and Gold is highlighted by what the Pro Football Hall of Fame describes as occurred during the 2004 and 2005 seasons. Cowher guided an injury-plagued team to a franchise record 15 wins that season. His 2005 team became the first team ever to win nine road games and the first sixth-seeded team in NFL history to win a Super Bowl. The amazing playoff run was capped by 21-10 victory over the Seattle Seahawks in Super Bowl XL. The Pro Football Hall of Fame gave Coach Bill Cowher the honor of enshrinement into their Canton, Ohio Museum in 2020.