MacTavish, 54, rejoined the Oilers organization this season after spending last season as Head Coach of the AHL's Chicago Wolves. He had previously spent eight seasons (2000-01 to 2008-09) as the head coach of the Oilers.
In 2005-06, MacTavish guided the Oilers to their first trip to the Stanley Cup Final since 1990, as Edmonton fell in seven games to the Carolina Hurricanes.
After being named the eighth coach in Oilers history on June 22, 2000, MacTavish compiled a career record of 301-252-103 (.537) in 656 regular season.
Howson rejoined the Oilers organization on March 12, 2013 as a Pro Scout, after five and a half seasons as GM of the Columbus Blue Jackets (2007-2013).
During his time with the Blue Jackets, Howson compiled a 173-190-59 record and advanced to the Stanley Cup Playoffs for the first time in franchise history in 2008-09, losing in the Conference Quarterfinals to the Detroit Red Wings.
The Toronto native was the Oilers' Assistant to the GM in 2000 and served as the club's Assistant GM from 2001-2007.