In 2001, Petrie joined The Fat Duck in Bray, Berkshire where he rose to head pastry chef role, during which time the restaurant achieved a third Michelin star and was ranked 1st on the list of The World's 50 Best Restaurants. In 2009, Petrie was appointed Head of Development of The Fat Duck Experimental Kitchen, later that year the restaurant was given a top score of ten out of ten in The Good Food Guide. His role also included development of dishes for all of Heston's restaurants and brands, including The Hinds Head and 2 Michelin star restaurant Dinner by Heston Blumenthal in central London. Petrie resigned from his post at The Fat Duck in 2013. In 2011/12 he published a paper 'Bittersweet Symphony' with Heston Blumenthal and Charles Spence, professor of experimental psychology at Oxford University exploring the manipulation of bitter and sweet tastes through the use of music.
In 2014-15 he completed a specially created year-long post as Head of Development at two Michelin Star and award-winning London restaurant The Ledbury, winner of Best UK restaurant three years in a row and UK’s best restaurant Observer Food Monthly.
Gordon Ramsay
Petrie joined the Gordon Ramsay Group in 2015 in the specially created role of Executive Head of Development. His role with Ramsay includes overseeing, creating and developing dishes for all 14 of Ramsay's UK restaurants with a focus on the fine dining restaurants.
Television and media
Petrie is the sous chef to Gordon Ramsay on Hell's Kitchen series 17 and 18 broadcast on Fox and later on ITV in the UK. Petrie has appeared on Heston's Fantastical Food, Big Chef Takes On Little Chef, Mission Impossible, Heston's Feasts, The One Show, and as both featured mentor and regular guest judge on BBC Masterchef and. International appearances include Top Chef Suomi Finland, Hansin Matkassa, Masterchef Australia and MasterChef Greece, and as the UK representative judge at World Chocolate Masters Final. Petrie regularly appeared as panel member on BBC Radio 4's The Kitchen Cabinet presented by Jay Rayner. He has contributed to many food publications including In Search of Perfection, The Big Fat Duck Cookbook, Patisserie and Dessert Magazine, In The Mix and Where Chefs Eat. He has been featured in The Guardian, Observer Food Monthly and as the cover feature in Restaurant