Emenalo has walked away from the club after a 10-year association, where he has become one of Roman Abramovich's most trusted advisors.
Chelsea confirmed the surprise news on Monday just a day after the Blues beat Manchester United at Stamford Bridge, a game Emenalo watched on from the bench.
Announcing his decision, Emenalo said: "This has been a very difficult decision to make, but one I believe is right for both myself and my family, and the club. I have had the privilege to work alongside some of the most talented people in the world of sport over the past 10 years, and I will depart incredibly proud of the achievements we have made. I wish Chelsea every success and look forward to following the club’s future triumphs from afar."
Director Marina Granovskaia said: "We are extremely grateful to Michael for his tireless work over the past 10 years. He has played an important role during the most successful period in the club's history, helping make Chelsea the club it is today. We will now be reviewing our management structure, and Michael will be a part of that process as we look ahead."
Antonio Conte added: "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. I have enjoyed working with him very much, we celebrated a Premier League title together in May, and I wish him the very best for the future."
