Craig Edwards has left Ware after just 27 days for their Bostik League North rivals Cheshunt, who are bottom of the division.
The former Billericay Town boss was appointed on December 6th having resigned as manager of Kingstonian in October.
He won two of his four games in charge of the Blues, drawing one, as he attempted to lift them away from relegation.
But now he’s left the club to try and steer the Ambers off the foot of the table following the departure of Steve Newing on Boxing Day.
A statement on Ware’s website, read: “It is, of course, an understatement to say that this is a disappointment. Craig had been in post for less than a month and had started to build a side clearly capable of recovering our lost position in the table.
“His departure will risk destabilising that side and although rules are such that he cannot easily take those players with him, retaining them at Wodson Park may become more difficult in an atmosphere of uncertainty.
“The need to recruit a new manager is therefore paramount. Details of an appointment will be released as soon as possible.”
Cheshunt have conceded 68 goals in 26 games which as left them joint bottom with Romford and five points adrift from safety.
Edwards will aim to stop Cheshunt’s seven-game losing streak at home to third-placed Maldon & Tiptree on Saturday.