text: 2005 In 2005, Glock shifted his career to the United States, racing in the Champ Car World Series with Paul Gentilozzi's Rocketsports team. His best finish was second place at the Circuit Gilles Villeneuve at the Molson Indy Montreal in Canada, where he was defeated by Oriol Servia. In the closing laps of the race Glock twice retained the lead over Servia by missing the track's final chicane. As the rules require drivers who gain or retain a position by driving off the racing surface to give way, Glock was asked to move over by Champ Car officials, and let Servia take the lead. Glock obliged midway through the final lap, giving him enough time to try to take the lead back, but to no avail.  Glock finished 8th in the final season points standings and won the Champ Car World Series' Rookie of the Year award.
  GP2
  2006–2007
  In 2006, Glock raced in Europe in the GP2 Series, the level immediately below Formula One. He started with the midfield BCN Competicion team, gaining average results. In mid-season, however, he moved to the front-running iSport team and after a string of improved results finished fourth in the drivers' standings, also winning an award for "most improved driver" in the series. In  he tested an F1 car again for BMW Sauber, which led to him being signed in December as the team's second test driver for .