Loomis won the 2001 NASCAR Winston Cup Series championship as Gordon's crew chief, and collected a total of 26 wins and 98 top 5s.

With the team that emerged from the merger of Gillett Evernham Motorsports and Petty Holdings, Loomis served as the executive director of racing operations, prior to being released in 2012.

As an underdog at Petty Enterprises, Loomis managed to lead the famed #43 car to the winner's circle three times.

In 2000, Loomis earned the honor to work at Hendrick Motorsports as Jeff Gordon's crew chief and prior to that he had not received a check from anyone other than Petty Enterprises.

[citation needed] Robbie Loomis's greatest success came as crew chief for NASCAR legend Jeff Gordon.

Despite winning 3 races and finishing 9th in the season standings, performance was well-short of the high standards set by the #24 Hendrick Motorsports team.

However, in the final 5 races of the year, the team posted 5 top-10s and 3 top-5s: a clear indication of the improving communication between Loomis and Gordon.

The momentum carried into 2001 and the #24 team reached the pinnacle of the sport by winning the NASCAR Winston Cup Championship.

The team shockingly missed NASCAR's "Chase for the Championship," and Loomis was replaced by 26-year-old Steve Letarte for the final 10 races to prepare the young crew chief for 2006.