Austrian Christian Klien has landed the job of test and reserve driver for BMW Sauber for the 2008 F1 season.
Klien has 48 F1 races under his belt
Klien, 24, competed for Jaguar and Red Bull from 2004 to 2006 before spending a year testing for Honda.
BMW Sauber team boss Mario Theissen said: "We wanted a third driver with Formula One racing experience.
"Christian is familiar with the format of a Grand Prix weekend and can step into the breach right away should one of our drivers have to back out."
Estonian Marko Asmer, 23, will be the team's second test driver.
BMW Sauber needed to use German Sebastian Vettel as a stand-in at last year's US Grand Prix after Poland's Robert Kubica crashed heavily in Canada.
Vettel subsequently moved to Toro Rosso as a full race driver while Germany's Timo Glock, who took over as BMW's reserve in 2007, will be competing for Toyota when the season starts in Australia on 16 March.
Klien had hoped for a race seat with Force India but lost out to Italian Giancarlo Fisichella.