Güler began his career as candidate District Governor on 14 March 1973 in Balıkesir.

After taking post as Deputy District Governor of Çal in Denizli Province and then District Governor of Pehlivanköy in Kırklareli Province and Horasan in Erzurum Province, he was assigned to the Directorate of Personnel Branch at the Ministry of Interior, where he served as Branch Director and later as Director General.

On 12 May 2010 Güler began the position of MOI Undersecretary for Security and Public Order.

On 24 January 2013, he was appointed minister of interior, replacing İdris Naim Şahin in the post.

[4] On 17 December 2013, his son Barış Güler was arrested as a consequence of a corruption operation.