Emenalo's role also saw him have an influence on transfers, including Chelsea's much-scrutinised loan strategy, and developing players from the academy.
Former Nigeria global footballer, Michael Emenalo has quit as the technical director of English side Chelsea, stepping down from his post after 10 years with the Blues.
The former Nigeria worldwide first joined "The Blues" as opposition scout under manager Avram Grant and rose to become technical director.
According to a report on the UK Telegraph, Emenalo made a decision to leave after declining not to engage in a three-way power battle with current Chelsea manager Antonio Conte and Marina Granovskaia who are known not to see eye to eye.
"I am very sorry to see Michael leave Chelsea, and I would like to thank him for all his help and support since I arrived at this club", he said.
One of Roman Abramovich's most trusted advisors, the 52-year-old Nigerian enjoyed great success with the club, overseeing three Premier League titles, a Champions League trophy, three FA Cups, a League Cup and an Europa League, as well as several FA and UEFA youth championships.
On the pitch, Chelsea bounced back from their midweek loss to Roma in the Champions League with a deserved 1-0 win over Manchester United at Stamford Bridge, with Alvaro Morata's header the difference between the sides.
During his 10 years at Stamford Bridge, Chelsea have won a host of major honours but have had 10 different managers in that time.
Chelsea Chairman Bruce Buck added: "It is with regret that the owner and board of directors accepted Michael's resignation this week. We are sorry to see him go but understand his desire to move on and explore new challenges".