After graduating from military school, Berisha served in the Yugoslav People's Army. From 1984 to 1985, Berisha served as a platoon commander in Karlovac.[2] From 1985 to 1988, Berisha attended a military school in Sarajevo to train to be an officer.[2]
From 1988 to 1991, after graduation to a Yugoslav People's Army officer, Berisha served as a company commander in Delnice, Croatia, which was then part of Yugoslavia.[2]
From 1991 to 1992, Berisha fought in the Croatian War of Independence on the side of the Croatians.[2]
From 1998 to 1999, Berisha was a member of the Kosovo Liberation Army (KLA).[2][3] In this time he fought in the Dukagjini region of Kosovo.[4]
In 1999, following the disarmament of the KLA, Berisha joined the Kosovo Protection Corps (KPC).[2] From 1999 to 2002, he served as the Chief of Staff of the KPC's Second Defense Zone.[2]
From 2002 to 2009, Berisha directed the Hamëz Jashari military academy.[2]
In 2009, Berisha was named the Deputy Commander of the Rapid Reaction Brigade of the newly formed Kosovo Security Force (KSF).[2] The KSF was a relatively new entity at the time, having come into existence on 21 January 2009.[5] Berisha continued in this position until 2014.[2]
In 2013, Berisha entered politics, joining the Alliance for the Future of Kosovo. That year, he became a member of the AFK's governing council and its presidency.[2]
In 2014, Berisha ran for a seat in the Assembly of the Republic of Kosovo and won. He became a member of the Assembly's Committee on Rights, Interests of Communities and Returns and the Committee for Economic Development.[2] He also became the Vice Chairperson of Oversight Committee for Kosovo Intelligence Agency.[2]
In February 2016, a Serbian court convicted Berisha and seven other former KLA soldiers in absentia of acts of terrorism for attacks on soldiers of the Yugoslav army in September 1998.[3] Before the trial ended, Berisha questioned the credibility of the indictment and the allegations on which it was based.[3]
Berisha was reelected to the Assembly in the 2017 elections in Kosovo.[2]
On 9 September 2017, Berisha was appointed the Minister of the Kosovo Security Force.[2] He replaced Haki Demolli.[6]
As minister for the security force, Berisha worked towards closer cooperation between the Albanian Armed Forces and the Kosovo Security Force.[7]