Kammala jumla mai zuwa: Bayan burgewa a cikin Formula Three da kuma kammala Rookie na Shekara na International Formula 3000 tare da nasara a Belgium a 2004, Robert Doornbos an hayar da shi a matsayin direban gwajin Jumma'a don Jordan Grand Prix don Babban Prix na China na 2004. Doornbos ya burge a matsayin direban gwaji don 'yan tsere na karshe na kakar, kuma an sake nada shi don kakar 2005, kodayake ya yi tsere da lasisin tsere na Monegasque a wannan shekarar. A cikin
2005 Grand Prix na Jamus, ya haɗu da ɗan'uwansa ɗan ƙasar Holland Christijan Albers a Minardi, wanda ya fara a farkon wannan shekarar a matsayin direba na yau da kullun na ƙungiyar. A cikin 2009, an nada Doornbos a matsayin gwajin Jumma'a da direban ajiya a Red Bull Racing, kuma zai maye gurbin Christian Klien don tsere 3 na ƙarshe na kakar. Bayan tsere 11 kawai a cikin shekaru 4, aikinsa na Formula One ya ƙare yayin da ya tafi ya tuka Champ Car World Series a 2007.