He coached on two Super Bowl-winning teams with the Pittsburgh Steelers of the National Football League (NFL).
In the early 1960s, he compiled a record of 51–11–3 as head coach at Bishop Watterson High School in Columbus, Ohio.
The New England Patriots gave Walker his first professional football opportunity as their defensive backs coach in 1977.
Walker was on the staff of two Pittsburgh teams which won Super Bowls, in 1978 and 1979.
Walker later coached with the Canadian Football League's Montreal Concordes[4] the short-lived United States Football League's Chicago Blitz[5] and at various high schools in Georgia and Las Vegas.