Emenalo has already been linked with a position at Monaco. He joined Chelsea in 2007 and has been technical director since 2011.
He acted as a link between the first team and the Blues board, had an influence on transfers, including Chelsea’s much-scrutinised loan strategy, and was involved in developing players from the academy.
The 52 year old, in a statement, said it has been a very difficult decision to make, but one he believes is right for both himself, his family, and the club.
The Blues have won the Premier League title three times, the FA Cup, the League Cup, the Europa League and the Champions League while Emenalo has been at the club.