Robert Visoiu will complete MW Arden's line-up for the 2013 GP3 Series.
The team announced earlier on Wednesday that Carlos Sainz Jr and Daniil Kvyat would fill two of its three cars.
Visoiu switches to MW Arden after contesting last year's championship with Jenzer, showing promising form at times and finishing second in race two at Barcelona.
Arden sporting director Julian Rouse hopes the 16-year-old Romanian can emulate reigning champion Mitch Evans, who won his crown in an MW Arden car.
"At such a young age [Visoiu] is a very proficient and talented driver," Rouse said.
"Robert impressed us a lot when he joined the team for the Estoril test session last year, being as competitive as other drivers we tested despite his young age.
"Only a few years ago we recruited a young 16-year-old, who went on to win the GP3 championship with us last year. It would be nice to see this happen again."