Goran Klemenčič completed a master’s degree at Harvard Law School after graduating from both Faculty of Law and Faculty of Computer Science at University of Ljubljana. He continued with post-graduate studies at the National University of Ireland.
He worked as a consultant at The European Committee on Crime Problems of the Council of Europe in Strasbourg, and the Organization for Economic Co-operation and Development (OECD) in Paris. He also participated in the preparation of the legal bases of the International Criminal Court (ICC) in The Hague. For two years he was also a member of the OECD anti-corruption management committee.
In 2010, he became a Chief Commissioner of the Commission for the Prevention of Corruption of the Republic of Slovenia. In 2013, the Commission's 2012-2013 Investigation Report on the parliamentary parties' leaders revealed that Janez Janša, PM, and Zoran Janković, the head of the opposition, systematically and repeatedly violated the law by failing to properly report their assets. On February 18 2015, the Supreme Court of Slovenia ruled that all sections regarding Janez Janša must be removed from this report because the Commission for the Prevention of Corruption failed to send the draft of the report to Janša for submission of his comments, and thus seriously violated Janša's rights, granted by the article 22 of the Slovenian constitution. On May 29 2015, the Supreme Court of Slovenia additionally ruled that all sections regarding Zoran Janković must also be removed for exactly the same reason.