He joined the cast of the US show Glee in the 4th season as NYADA Junior Brody Weston and appeared in Terra Nova as Mark Reynolds.

He learned to play the guitar, and wrote his first song entitled "Change" which was based on his move from South Africa to Australia.

After singing Marc Cohn's "Walking In Memphis", Geyer played a self-composed piece called "Nice to Meet You".

Although Geyer was one of the most popular characters in the behind-the-scenes interviews on Idol Backstage, he was eliminated from the show on 13 November after receiving the lowest number of votes from home viewers losing out to runner-up Jessica Mauboy and eventual winner, Damien Leith.

Within weeks of the Australian Idol fourth-season finale Geyer signed a multiple album recording-contract with SonyBMG Australia.

[4] Geyer worked with Grammy Award nominated Music Producer Greg Wells and co-wrote eight of the thirteen tracks on his debut album.

Geyer was to support Young Divas on their nationwide Australian tour but dropped out to instead promote Rush in several in-store appearances and signings.

In November 2007, Jonathon Moran from The Daily Telegraph reported Geyer had joined the cast of long-running soap opera Neighbours.

In 2012, Geyer maintained a major-recurring role on the Fox Network Steven Spielberg produced science fiction drama television series Terra Nova.

In July 2012, Geyer was announced to have been cast in a recurring role in the fourth season of the Fox musical comedy drama television series Glee.

[13] Geyer portrayed the role of Brody Weston an upperclassman who becomes involved with the series protagonist Rachel Berry (Lea Michele) who both attend NYADA.

Geyer made his first appearance on Glee in the series premiere episode "The New Rachel" which aired on 13 September 2012 to over 7.41 million viewers.

[14] In 2015, Geyer played Daniel in the Georgian film, Landmine Goes Click, opposite Sterling Knight and Spencer Locke.

[18][19] In 2007, Geyer began a relationship with Lisa Origliasso of Australian duo The Veronicas whom he met at the 2007 ARIA Awards.