Facu Regalia will join the GP3 Series with Jenzer from next weekend's Silverstone round.
The 20-year-old Argentine driver is already contesting Auto GP and European Formula 3 Open this year, and is currently in the top six in both championships.
Regalia joins Patric Niederhauser and Robert Visoiu in the Jenzer line-up. The team took its first win of 2012 with Niederhauser in Valencia last weekend.
Jenzer started the season with Czech driver Jakub Klasterka in its third car for the opening rounds, but only fielded Niederhauser and Visoiu in Valencia.