Zuber drove for Carlin Motorsport in the Formula Renault 3.5 Series in 2005, finishing sixth in the championship with one win at Estoril and pole position at Valencia apiece.
He took a perfect result of pole position, win and fastest lap at the Silverstone feature race, but his overall season was inconsistent and he finished ninth in the championship, compared to Glock's championship-winning campaign.
Four podium finishes saw him repeat his ninth place in the championship of the previous year, but he failed to achieve a race victory for the first time in the category.
He was not helped by failing to score any points in the final seven races of the season, a run which included disqualification from third place at the Spa-Francorchamps for a technical infringement that both he and the team considered to be particularly unfair.
[6] Zuber also drove in the first two rounds of the 2008–09 GP2 Asia Series season for the FMS International team, after which he was replaced by Rodolfo González.
Despite scoring more podium finishes, the year was unstable off-track: first Giancarlo Fisichella's stake in the team was bought back by the Coloni family, its original founder and owner; then the outfit missed the eighth round of the championship after its cars were impounded as a result of court proceedings initiated by driver Andy Soucek, who had briefly been employed by FMS.