 He obtained his MA in 1990, but in 1992 he left the research work at the university and decided to undertake public service in Slovenia instead.A member of Slovenian Social Democratic Party since 1990, Zver served as advisor to the Deputy Prime Minister Jože Pučnik and later to the Minister of Defence Janez Janša.After the Social Democratic Party left Janez Drnovšek's coalition government in 1994, Zver served as a secretary of the Municipal Council of Ljubljana until 1999, and later as an advisor to the parliamentary group of the Slovenian Social Democratic Party (now known as the Slovenian Democratic Party) in the National Assembly of Slovenia.