Jason Atherton is to leave his position of chef-patron at Gordon Ramsay Holdings' (GRH) Maze at the end of April to pursue a solo project.
The chef, who has been with GRH for nine years, five of which were at Maze, said the 'time was right' to take on a new challenge. He will remain a shareholder in GRH.
It is not yet known what Atherton's next step will be. Maze's current executive chef James Durrant will on take his role at Maze when he leaves.
Atherton said: "After an amazing nine years with GRH, the time is right for me to take on a new challenge. I will remain a shareholder in maze and I have every confidence in James Durrant."
In a statement Gordon Ramsay wished Atherton well: “I am hugely proud of what we have achieved together, particularly the development of Maze, in which he remains a shareholder. I am delighted that Jason feels the time is now right to realise his own business ambitions and I wish him every success for the future."
In an interview with Restaurant magazine last month, Atherton said Ramsay had had 'a huge impact' on his career.
"He taught me how to run a restaurant and how to train a brigade to run my restaurant when I'm not there," he said.
The Maze brand, which started in London, now has four restaurants - in London, New York and Capetown and there are plans to set up three more outposts, in Australia and the Middle East.