Colchester United have confirmed that manager Kevin Keen has left the club with immediate effect.
The 49-year-old took over at the Essex club in December but could not prevent their relegation to League Two, which was confirmed after Saturday's loss to Burton Albion.
A statement on the U's official website read “After a meeting with the owner, Robbie Cowling over the future direction of the club, Kevin Keen has decided to leave Colchester United with immediate effect.
Keen was part of the backroom staff at West Ham for nine years and was placed in caretaker charge of the club three times during this period.
After leaving the Hammers in 2011, Keen had spells coaching at Liverpool, West Brom and Reading before getting his first full time managerial position with Colchester.
The U's have confirmed that David Wright will take charge for the final two games of the season against Barnsley and Rochdale.