Terry Gregon (right) will continue to serve the NHL as a consultant on officiating matters.
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TORONTO (AP) -- Terry Gregson is retiring as the NHL's head of officiating.

Stephen Walkom will leave his job as an on-ice referee to take over as senior vice president and director of officiating, the league announced Wednesday.

It's a familiar role for Walkom, who held the position from 2005-09.

Gregson, who joined the front office in 2005 after a 25-year career as a referee, will serve as a consultant to the NHL on officiating matters, including the league's participation in the 2014 Olympics.

"Terry had the unique ability to expertly manage the 78-man NHL officiating team," NHL senior vice president Colin Campbell said in a statement. "His tireless efforts behind the scenes to ensure that NHL officiating was the best it could be on a nightly basis were seldom recognized publicly, but we greatly appreciate his dedication to the game both on and off the ice for the past 33 years."

Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

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