Kammala wannan jumla: Geiger ya fara yin hukunci a shekarar 1988. Ya zama Babban alkalin wasa na Tarayyar Kwallon Kafa ta Amurka a 2003 kuma ya yi aiki a cikin Major League Soccer daga 2004 zuwa 2018. Ya yi hukunci a wasannin CONCACAF tun lokacin da ya zama alkalin wasa na FIFA a shekarar 2008, kuma ya yi hukunci a gasar cin kofin zinare da sauran gasa da wasannin kasa da kasa. An zabi Geiger don
Gasar CONCACAF U-20 a 2011, inda ya yi hukunci a wasan karshe.