During his youth, he went with his grandfather (who lived in Iowa), to see local Midwest racers such as Dick Trickle, Ken Schrader, and the Wallace brothers battle on dirt tracks.

At the same time as his racing career was beginning, he was attending California State University with the intention of obtaining a degree in sports marketing.

With success in the SCCA, Marks moved to the Rolex Sports Car Series GT Class in 2004 where he met good friend Joey Hand.

Switching between the GT class and the World Challenge, Marks racked up four wins, eight podiums, and thirteen top tens between the two series.

At the same time, Marks teamed with Bill Auberlen in the Continental Tire Sports Car Challenge for Turner Motorsport, finishing 3rd in points with 5 poles and 5 wins in 9 starts.

Marks returned to the Camping World Truck Series for 2011, driving for Turn One Racing in the No.

In 2013, Marks made his Sprint Cup Series debut at Sonoma Raceway in the 2013 Toyota/Save Mart 350, driving the No.

In 2016, Marks expanded his Chip Ganassi Racing schedule in the Xfinity Series, driving the No.

[8] At the Mid-Ohio Sports Car Course, Marks led a race-high 43 laps in a race plagued by rain to claim his first NASCAR victory; he dedicated the win to former Ganassi driver Bryan Clauson, who had died earlier in the week in an accident.

[14] Marks returned to the Grand Am Rolex Sports Car Series for the 2009 season driving the TRG No.

The team began the season with an impressive victory in the GT class at the Rolex 24 Hours of Daytona.

Marks' father, Michael, is a partner in the private equity firm Riverwood Capital, board member of GoPro and a minority owner in the Golden State Warriors.

[4] In 2015, HScott Motorsports owner Harry Scott Jr. took control of TSM's K&N Pro Series East team, and partnered with Marks to field four cars under the banner HScott Motorsports with Justin Marks for Scott Heckert, William Byron, J. J. Haley, Dalton Sargeant,[17] and Rico Abreu.

[19] In August 2020, Marks partnered with former NASCAR executive Ty Norris to create Trackhouse Racing, a Cup Series team that debuted in 2021.

The team operates on a cause marketing strategy that includes a STEM education program for minority populations in the United States.

[20][21] On June 30, 2021, Trackhouse announced their purchase of the NASCAR operations of Chip Ganassi Racing, with its two charters for the No.

On January 9, 2023, a consortium consisting of Trackhouse, DEJ Management, Jeff Burton Autosports, Inc., and Kevin Harvick Incorporated purchased the CARS Tour.