Alex Brundle will drive one of OAK Racing's Morgan-Nissan LMP2s in the Brazilian round of the World Endurance Championship at Interlagos next weekend.
The 22-year-old Briton, who took pole position for the LMP2 class at Silverstone last month in a Greaves Motorsport Zytek, will join OAK regulars Bertrand Baguette and Dominik Kraihamer in the #35 machine.
"OAK Racing is very pleased to welcome Alex Brundle as the new addition to our crew for the 6 Hours of Sao Paulo," said OAK team principal Sebastien Philippe.
"He is a fast, talented young competitor and, alongside Bertrand Baguette and Dominik Kraihamer, he forms part of a team from whom we can expect a good result in Brazil."
Brundle, whose GP3 campaign comes to a close at Monza this weekend, added: "I was delighted to receive the call from Sebastien asking me to drive at Sao Paulo.
"The OAK cars have been fierce challengers in both the ELMS and WEC and my team-mates are very strong, so I am confident we will have a good package. I am looking forward to using this opportunity to continue to carve out a career in sports car racing."