Colombian Tatiana Calderon will be Sauber’s test driver this season.
The 24-year-old, who races in the GP3 category, has been promoted from her previous role as development driver.
The Swiss-based team said she would “complete simulator training and coaching with engineers both on-site and during grand prix weekends”.
Calderon said: “I have been able to expand and develop my skills as a race driver and am convinced I will be doing so throughout this year.”
Team principal Frederic Vasseur said: “Tatiana is very hard-working, and has impressed the team with her focus and dedication. She has made good progress as a driver, developing both her mental and physical capacities continuously over the past few years.”