* 1981-1985: Worked as a janitor at a Ramada Inn
* 1985-1989: Worked as a cook at various restaurants
* 1989-1994: Owned and operated a fast food restaurant called El Tejano Tex-Mex Grill
* 1994-1999: Owned and operated a restaurant called Johnny Garlic's
* 1999-2002: Hosted the Food Network show Guy's Big Bite
* 2002-2008: Hosted the Food Network show Diners, Drive-Ins and Dives
* 2008-present: Host various TV shows including; Guy's Grocery Games, Tournament of Champions, Guy's Chance of a Lifetime & Big Restaurant Bet.
In addition to his work on television, Fieri has also written several cookbooks and co-founded Food Network Kitchen