Since forming out of the ashes of predecessors Rushden & Diamonds, the supporter-owned club have enjoyed three promotions to rise from the United Counties League to the Southern League Premier Central.
The ex-Accrington Stanley favourite called time on his professional career at the age of 29 a year-and-a-half ago. He had previously revealed he had been receiving treatment for depression, anxiety and bulimia.
McDonald beat off stiff competition to sign the 25-year-old from Halesowen Town, who have been switched to the Northern Premier League’s new Division One Midlands for 2021-22.
The Hertfordshire club were originally placed into the Southern League Step 3 Premier South division for one season in 2018-19 before being shifted into the Premier Central.
Posh are looking to build strong links with local clubs and the idea of the partnership is to establish a pathway with outstanding local grassroots clubs.
Bromsgrove boss Bren Kelly was in no doubt how important the competition had been, both for his players and also in helping him shape his squad ahead of the new Southern League Central Premier Division season.
On Wednesday night, the Step 6 side faced Hitchin Town’s Under-19 college team in a friendly and got a nasty shock when several of the Canaries’ first team turned up.
The Lambs were looking good for promotion in the past two Southern League Central seasons, only for their push to be halted prematurely on both occasions.