The former Linfield boss led the Sky Blues to three Irish Cup finals and three BetMcLean Cup deciders – including a 2-0 triumph over Carrick Rangers in the 2016/17 finale – and helped them secure European football on two occasions.
A titan of the local game, Jeffrey finished his Ballymena reign with a win percentage of 47%, coming out on the right side in 163 of his 346 games at the Showgrounds.
Here are all the best photos from his Ballymena reign, from cup victories to European adventures.
17. Cup final heartbreak
David Jeffrey walks past a trophy he has won seven times in total after Ballymena United were beaten 4-0 by Crusaders in the 2022/23 Irish Cup final at Windsor Park. It marked Jeffrey's 12th Irish Cup decider and his final game in charge of Ballymena. Photo: ©INPHO/Presseye/Brian Little