In 2005 he made his sports car debut with Speed Source co-driving with James Hinchcliffe in the Grand-Am Cup ST class, en route to 7 top-10 finishes in 7 races.

and had 7 top-10 finishes in the Grand-Am Cup ST class driving for SpeedSource, Matt Connolly Motorsports, and Compass 360.

He also made his Koni Challenge GS class debut thanks to Jim Click Racing, finishing 6th as the highest placing Mustang.

In 2008, he made the progression to a full season in the GS class under Motorsport Technology Group with 4 podium finishes driving a BMW Z4 M-Coupe and Porsche 997.

That year he also joined Turner Motorsport to drive a BMW M3 at the Rolex Sports Car Series, finishing fourth at Montreal.

In 2013 he made his American LeMans Series Debut driving for Aston Martin Racing in the 2013 12 Hours of Sebring, finishing ninth.

In 2014 he switched to Multimatic Motorsports in the Continental Tire Sports Car Challenge series driving the Boss 302R with Ian James winning the season finale at Road Atlanta.

He also drove for Scuderia Corsa in the Ferrari 458 in the GTD class in the 24 Hours of Daytona with Ken Wilden, Dave Empringham, and Rod Randall.

In 2015 he drove with Scott Maxwell in the Boss 302R and debut the Ford Shelby GT350R-C, finishing 3rd in the Championship and winning at Lime Rock.

In addition to testing and development, he has also provided road racing training for Roush drivers Carl Edwards, Greg Biffle, Joey Logano, Brad Keselowski, Chris Buescher, Ricky Stenhouse, Darrell Wallace Jr., Aric Almirola.

[11] In 2017, Johnson joined Richard Petty Motorsports for his Monster Energy NASCAR Cup Series debut at Sonoma Raceway's Toyota/Save Mart 350, driving the No.