Tomassi has previously competed in series such as the ACT Late Model Tour, the PASS North Super Late Model Series, and the Granite State Pro Stock Series. In 2024, it was revealed that Tomassi would make his
NASCAR Craftsman Truck Series debut at
Lucas Oil Indianapolis Raceway Park, driving the No. 22
Ford for
Reaume Brothers Racing. It was later revealed that he would also make his debut in the
ARCA Menards Series at the same track, driving the No. 93
Ford for
CW Motorsports. In the ARCA race, Tomassi qualified in twentieth and finished seven laps down in seventeenth, and in the Truck Series race, he started and finished in 31st place. He then ran the following East Series race at the
Milwaukee Mile, where he finished in fifteenth. On January 15, 2025, it was announced that Tomassi would attempt to make his debut in the
NASCAR Xfinity Series, driving the No. 66
Ford for
MBM Motorsports at
Bristol Motor Speedway and
Martinsville Speedway. However, he failed to qualify for both races. He did eventually make his series debut at
Iowa Speedway, where he drove the No. 35
Ford for
Joey Gase Motorsports with Scott Osteen in a collaborative effort with MBM Motorsports, where he finished in 34th. That same year, he made seven starts in the Truck Series, where he split time between driving for
Reaume Brothers Racing and
MBM Motorsports. In 2026, it was announced that Tomassi would run the No. 69
Ford for MBM at
Daytona International Speedway, where he would fail to qualify. He would then be announced to run at the following race at
EchoPark Speedway for the team. ==Motorsports career results==