Tyrone Under-21 management duo Raymond Munroe and Cathal McAnenly have stepped down after three seasons in charge.
The pair won two All-Ireland minor titles with the county in 2008 and 2010 and three Ulster minor titles.
However their record at Under-21 level was poor, suffering Ulster final defeats to Cavan in 2011 and 2012 and a quarter-final exit to Donegal in 2013.
Tyrone hurling boss Tom Magill has also stepped down, having guided the team to Lory Meagher Cup success in 2012.
Munroe and McAnenly presided over star-studded minor teams, featuring current senior panellists such as Peter Harte and Ronan O'Neill and won Ulster minor titles in 2007, 2008 and 2010 as well as two All-Irelands.
Despite being strong favourites to dominate at Under-21 level, the Red Hands suffered two Ulster final defeats to Cavan before crashing out in the first round this year to Donegal.
Tyrone have confirmed the process of seeking nominations to both posts will commence later in the summer.