The team's early years centered on junior single-seater categories. Its first significant victory came in 2007 when American driver Dane Cameron won the Star Mazda Championship under the JDC banner. Further Star Mazda titles followed in 2009 with British driver Adam Christodoulou, and the F2000 Championship Series was claimed that same year by Chris Miller. Frenchman Tristan Vautier added another Star Mazda title in 2011, a scholarship victory that helped launch his subsequent Indy Lights and IndyCar career.
In 2014, JDC-Miller entered the newly unified United SportsCar Championship, the competition formed from the merger of the Rolex Sports Car Series and American Le Mans Series. In its debut season, the team's best result was a third-place finish in the Prototype Challenge class at Road America with drivers Chris Miller and Stephen Simpson. The 2015 season brought three podium appearances, including third-place finishes at the Daytona 24 Hours and Canadian Tire Motorsport Park.
The team's first major victories in sports car racing arrived in 2016, when it won the 24-hour race at Daytona and the Long Beach Street Circuit race in the Prototype Challenge class. Mikhail Goikhberg and Stephen Simpson were the primary drivers, and the team finished third overall in the class standings at season's end.
For 2017, JDC-Miller stepped up to the full Prototype class, the top tier of IMSA competition. Goikhberg and Simpson finished second at both Watkins Glen International and Canadian Tire Motorsport Park, placing fourth overall in the championship standings.
The 2018 season marked another milestone as the team fielded two cars simultaneously for the first time. Car number 85 was driven full-season by Robert Alon and Simon Trummer, while car number 99 was shared by Goikhberg and Simpson. The only victory of the year, and the team's first in the full Prototype class, came for Simpson and Goikhberg at Watkins Glen International. The 2019 campaign, however, was the team's most modest to that point, with cars numbered 84 and 85 driven by combinations of Stephen Simpson, Simon Trummer, Mikhail Goikhberg, and Tristan Vautier collecting only modest points finishes across the ten-round season.
In June 2022, Porsche confirmed JDC-Miller MotorSports as the first customer team to field the new Porsche 963 prototype race car in the IMSA WeatherTech SportsCar Championship's GTP class — the category introduced as part of the convergence between the FIA World Endurance Championship's Le Mans Hypercar rules and IMSA's top class. The team subsequently fielded the number 85 Porsche 963 full-time in GTP with Tijmen van der Helm and Laurin Heinrich sharing driving duties. In parallel, the team also ran the number 17 Porsche 718 Cayman GT4 RS Clubsport in the GS class of the IMSA Michelin Pilot Challenge Series with Chris Miller and Mikey Taylor.
JDC-Miller MotorSports represents a consistent thread through American motorsport across three decades, evolving from junior open-wheel championships into the highest levels of IMSA prototype competition. The team's willingness to field two-car programs and its early adoption of the Porsche 963 for the GTP era underline its standing as a significant customer racing organization in North American sports car racing.