Following her graduation, she worked at the Theatre Institute in Bratislava. From 1999 to 2006 she was its director.[1] Additionally, she was the editor of the Divadlo v medzičase journal, published from 1996 to 1998, which covered the theatre scene in Slovakia.[1][3] Since 2002, she has been a member of the editorial board of a Czech theatre magazine Svět a divadlo.[4]
From 2009 and 2013 and again from 2018 to 2023 she was the content director of Film Europe Media Company SK & CZ, which airs European films in the Czech Republic and Slovakia and operates a Film Europe cinema in the Pistori Palace in Bratislava as well as the Edison Film Hubs in Prague and Bratislava.[5]
Form 2006 to 2009 she was the director of Slovak National Theatre (SND). During her tenure the new SND building was opened.[6] From 2013 to 2023 she was the Opera Director of the Czech National Theatre.[7]
On 14 May 2023, President Zuzana Čaputová installed Hroncová as the minister of culture in her technocratic government.[8][9]