Graduating from karting to stock car racing in 2011, Fittipaldi spent two seasons in the NASCAR Whelen All-American Series before progressing to junior formulae in 2013.

Outside of open-wheel racing, Fittipaldi competed in the Deutsche Tourenwagen Masters in 2019, the European Le Mans Series from 2021 to 2022, and the FIA World Endurance Championship in 2023.

Fittipaldi has competed in the LMP2 class of the IMSA SportsCar Championship since 2023 for Rick Ware, Inter Europol, and Pratt Miller.

[2] Fittipaldi began his racing career in the NASCAR Whelen All-American Series, winning the track championship at Hickory Motor Speedway in 2011.

Fittipaldi continued racing for Fortec in 2016, this time driving in the Formula V8 3.5 Series alongside fellow rookie Louis Delétraz.

He won six races, dominating the championship, 44 points ahead of his closest rival Matevos Isaakyan.

51 Dale Coyne Racing with RWR car with Romain Grosjean, who planned to only enter road and street circuit rounds.

[citation needed] Fittipaldi started his debut Grand Prix in last and finished the race 17th, the last of the remaining drivers.

Haas team principal Guenther Steiner commented on Fittipaldi's debut "I think Pietro did a great job, considering he drove the car for the last time a year ago".

Fittipaldi was actively considered by Haas for Mazepin's seat in the race team but ultimately Magnussen was chosen over him.

In May 2018, Fittipaldi broke both legs in a crash during qualifying for the World Endurance Championship 6 Hours of Spa-Francorchamps race.

[25][26] In January 2023, it was announced that Fittipaldi would drive full-time in the 2023 FIA World Endurance Championship for Jota Sport alongside David Heinemeier Hansson and Oliver Rasmussen.

[27] † Fittipaldi did not win the national championship; he was the individual track champion of Hickory Motor Speedway.