Sebastien Saavedra will make his second IndyCar appearance in this weekend's season finale at Homestead.
The 20-year-old Colombian, who made his debut earlier this year in the Indianapolis 500 with Bryan Herta Autosport, will be the sixth driver used by Conquest Racing this season.
"I'm really happy to have an opportunity to drive for Conquest at Homestead," he said. "It will be tough because I have not driven an Indy car for four months but I am up to the challenge. Fortunately, I have a test day to prepare for the weekend."
He is hoping to use the outing as preparation for a full season in the series next year.
"IndyCar is my main focus for 2011, so it's really important to have an opportunity to start preparing now." Saavedra added. "Finally, to have my good friend Bertrand Baguette as a teammate means a lot."
Conquest boss Eric Bachelart added: "We're known as a team that likes to work with and give young drivers a chance, and having Sebastien join us for Homestead reinforces that. He may only be 20 years old but as he has proved age has nothing to do with driving a racecar.
"His performances have shown that he is a quick learner and we're really excited to have the opportunity to work with him. I think he and Bertrand, who has been making great progress throughout the season, will be a strong rookie combination in Miami."
Saavedra has won three Indy Lights races in the past two seasons and is also a race winner in Formula 3 and Formula BMW. He split with the Herta Lights squad prior to the race at Kentucky.