Petrie, who joined The Ledbury as head of development last March, will work to nurture creativity and talent at all 14 of Ramsay's UK restaurants.
Stuart Gillies, group managing director at GRG, said: "We are really excited to have Jocky join us. He and I have spent a long time talking through the exciting opportunities that lie ahead and we’re very pleased to have him on board in this new role as the company continues to grow”.
Petrie said he was excited to join a 'rapidly-expanding global company'. The chef, who was head pastry chef at The Fat Duck before being appointed head of development of the restaurant's Experimental Kitchen in 2009, took a break before taking up the year-long post at The Ledbury which was created for him.
He said: "Having followed Gordon's career, I feel excited to be joining this rapidly-expanding global company led by one of the world's most established and successful chefs.
"Coming from a background of developing menus and ideas for two and three Michelin star-level restaurants, this larger scale role of overseeing 14 world-renowned restaurants within the UK feels like a natural and challenging step forward for me.
“I hope to bring a fresh perspective to the creative process within the company by working alongside Gordon and his Head Chefs to build and support a strong creative development team and nurture exciting young talent."