Reeves had been at the club since 1998 when he joined as a player before finally hanging up his boots in August 2005 when he broke his leg against Wycombe in the cup.
Had he not broken his leg Reeves may well have been offered the managers job when King was sacked, but instead the job went to Onoura, and Reeves was assistant manager and coach.
But now with new player manager Dennis Wise and Gus Poyet at the club they will bring in their own coaching team.