Correa was involved in an accident at Spa-Francorchamps in 2019 which claimed the life of Anthoine Hubert and left the Ecuadorian in an induced coma.
The 21-year-old also sustained significant leg injuries in the impact and for a time faced the prospect of amputation of his right leg.
He made his racing return this season and is competing with ART Grand Prix in the FIA Formula 3 Championship.
“It's very special to be back with the Sauber Academy: they're the junior programme of the team I was with in 2019, when I had my first and only F1 test, and it's a great feeling to be working with them again,” said Correa.
“I am very excited to show the Academy's branding on my car and my helmet already from this weekend in France and I am looking forward to helping the team whenever needed, be it in the sim or elsewhere.
“I am very grateful to ART and Sébastien Philippe, and of course to Fred Vasseur, for all the support he has given me, and to everyone else at Sauber, from Beat Zehnder to all those who have been absolutely amazing and so supportive since my accident and throughout my recovery.
“It's an honour to be back with this team.”
Sauber team boss Frederic Vasseur added: “Honesty that I was inspired two years ago.
“It was a very tough time for everybody, and Juan Manuel had something like 22 surgeries.
“He spent the last two years with a clear target to come back., it was for him the main motivation, and I wanted to help him.
“The way I have to do to help him was to ask him to come back to the Academy and to try to support him on the on the project.”
Correa is in action this weekend for Round 2 of the FIA Formula 3 Championship.