Campbell also won overall the Bathurst 12 Hour in 2019 and 2024, driving a Porsche 911 GT3 R for Earl Bamber Motorsport and Manthey Racing respectively.

[2] In 2017, Campbell relocated to Germany and he drove for Fach Auto Tech in the Porsche Supercup, finishing third overall.

He won the class at the second round of the series, the 2018 24 Hours of Le Mans, driving with Christian Ried and Julien Andlauer.

2021 saw Campbell link with Proton Competition's American campaign in the IMSA Sportscar Championship as a co-driver with Cooper MacNeil in the GTLM class, placing fourth in the series sharing victories three times.

Campbell and Jaminet dominated the 2022 IMSA Sportscar Championship in the GTD Pro class with Pfaff Motorsports winning five of the ten races.

Campbell made his Supercars debut for Nissan Motorsport in 2016, co-driving with Todd Kelly in the Pirtek Enduro Cup.