In October 2005, Dieterle competed in and won the first season of Top Chef. Following his win on the series, he left The Harrison in early 2006 to plan the opening of his own restaurant. His first restaurant, Perilla, opened in May 2007 in New York City. In 2010 he opened Kin Shop, a Thai restaurant. Most recently, he opened The Marrow in New York City. The food at The Marrow was a mashup of Italian and German cuisine and an ode to Dieterle's heritage. The Marrow closed its doors in 2014 after less than two years. In late 2015, Dieterle closed his two remaining restaurants, Kin Shop and Perilla. Dieterle said he was taking a leave from the restaurant and hospitality business.
In a positive 2010 review of Kin Shop in the magazine New York, food critic Adam Platt called Dieterle "the original (and easily most talented) winner" of Top Chef.