Deputy mayor Aleš Čerin is a native of Ljubljana, who is a graduate of the Faculty of Law in Ljubljana. His knowledge of public administration goes as far as the lowest level (during the 1980's he was president of the executive council of the Ljubljana Bežigrad local authority) to the highest level (when he was first general secretary of the executive council of the Republic of Slovenia and then in the first government after democratic elections).
He worked for Mercator from 1992 to the end of 2005, and for eight and a half of those years (from 1997) as a board member. He has written two books: Vsi moji predsedniki (All of my Presidents, 1999) and Najboljše moštvo (The best team, 2006).
Mayor Zoran Janković has given him the fields of relations with the national government, which is his main duty, as well as dealing with relationships within the City Council, human resources and legal affairs. He is also the leader of the group of councillors from Zoran Janković's list.
Ljubljana