2013

In 2013, Bamber made his first appearance in Porsche's one make series in the Porsche Carrera Cup Asia with Malaysian team, Nexus Racing. He battled all season with Martin Ragginger but eventually won the drivers championship.^[9] Bamber was also successful in endurance racing, winning the Bathurst 12 Hour (Class B) with Grove Racing, alongside team owner and Carrera Cup Australia regular Stephen Grove and eventual Supercup rival Ben Barker.^[9] He was subsequently selected to race in three Porsche Supercup meetings.^[10] Bamber's inaugural sportscar racing season ended with victory in the Carrera Cup Asia race at the 60th Macau Grand Prix meeting, defeating nine-time World Rally Champion Sébastien Loeb in the process.^[11]

Porsche Carrera Cup Asia nominated Bamber for the Porsche Motorsport International Cup Scholarship shootout in Oschersleben, Germany, where he beat seven other top pilots from Porsche one-make cups series around the world.^[8] Part of the selection process included the simulation of a qualifying session as well as an entire race. He received funding of 200,000 Euros for his 2014 Porsche Supercup season campaign the following season.^[8]

2014

Bamber raced with FACH Auto Tech in the Porsche Supercup alongside Porsche Carrera Cups of Germany and Asia with Team 75 Bernhard and LKM Racing, respectively. After ten rounds in the Supercup, Bamber won the drivers championship with 155 points, ahead of Kuba Giermaziak on 132 points, becoming the first New Zealander to win the Porsche Supercup title and the first rookie to do so. After seven of the ten races, the FACH Auto Tech driver had already won the rookie classification.^[12] He dominated the Porsche Carrera Cup Asia season on his way to retaining the title as he won eight out of the ten races that he competed in despite missing two races in Zhuhai due to his concurrent commitments in Porsche Supercup and Porsche Carrera Cup Germany.^[9] With the support of Team 75 Bernhard, Bamber competed in ten out of eighteen rounds of the Porsche Carrera Cup Germany with two wins, five podiums and three fastest laps. He left the series holding second position in the Drivers Championship and was seventh overall at the end of the season.^[9] Bamber also replaced the injured Richard Lietz in the Porsche 911 RSR at the Petit Le Mans in the United SportsCar Championship, joining Porsche works drivers Patrick Long and Michael Christensen. Their second place ensured team Porsche North America, run by Core Autosport, won the manufacturers title in the championship.^[13]

2015

Prior to the 2015 season, Bamber signed with Porsche Motorsport as a works driver.^[14] In January 2015, he and fellow works drivers Jörg Bergmeister and Frédéric Makowiecki took the No.912 Porsche 911 RSR to seventh place at the 24 Hours of Daytona.^[15] Bamber and Nick Tandy joined Formula One driver Nico Hülkenberg in the Porsche LMP squad to contest the 6 Hours of Spa-Francorchamps and the Le Mans 24 Hours in a 919 Hybrid.^[16] Bamber's hybrid, car No. 19, was third on the grid after Porsche finished first, second and third in qualifying,^[17] but ended up winning comfortably. Bamber's childhood friend and Porsche teammate, Brendon Hartley, with co-drivers Mark Webber and Timo Bernhard, started from second on the grid in a 919 Hybrid and finished the race in second place.^[18] Bamber claimed his first career GT Le Mans (GTLM) pole at the Continental Tire Road Race Showcase at Road America in his first qualifying attempt as a Porsche factory driver on August 8.^[19] He bettered the previous lap record by more than a full second.^[20] He also made a guest appearance in the FIA World Endurance Championship's 6 Hours of Nürburgring, filling in for Klaus Bachler in the No. 88 Abu Dhabi-Proton Racing Porsche 911 RSR.^[21] Bamber made his debut in the FIA GT World Cup in the streets of Macau in November.^[22] The versatility in going between LMP1, GTE-Pro (GT Le Mans in IMSA) and GTE-Am this year, he said, made him a better driver.^[23]

2016

In 2016, Bamber continues to pilot the 911 RSR for Porsche North America and Porsche Motorsport in the IMSA WeatherTech Sportscar Championship and the 24 Hours of Le Mans in the World Endurance Championship, respectively.^[24] Bamber was the highest placed Kiwi driver at the 54th running of the Rolex 24 Hours of Daytona when his Porsche 911 RSR team came home third in the GTLM class and placed ninth overall.^[25] Bamber made a successful return at the Bathurst 12 Hour with a 2nd Class B victory for Grove Motorsport in as many races at the endurance classic in Mount Panorama, Australia alongside team owner Stephen Grove and V8 Supercars driver Scott McLaughlin.^[26] In changing weather conditions at the 12 Hours of Sebring, Bamber and his teammates in the #912 Porsche 911 RSR finished 3rd.^[27]

2017

On 3 December 2016, Bamber was confirmed as a member of the Porsche LMP1 team with Nick Tandy and André Lotterer to contest 2017 FIA World Endurance Championship. He co-drove the #2 car with Timo Bernhard and Brendon Hartley, replacing the retired Mark Webber.^[28]

Xfinity Series

¹ Ineligible for series points.