In recognition of this achievement since their appointment in 2012, the Tudors Supporters Club presented both with commemorative framed shirts ahead of the home game against Concord Rangers on Saturday.
By the time Brennan and Maynard hit 300 games, their five-and-a-half-year reign saw The Tudors use 185 players, win 147 games, draw 66 and lose 87.
Under Brennan and Maynard Hemel have scored 635 goals, conceding 446.