[10] On 18 June 2015, Hladík was appointed deputy mayor of the Brno-sever district with responsible for capital construction, education, culture and sports, social affairs, and informatics.

[15] [16] On 21 June 2016, after the renewal of the city coalition, Hladík became 1st deputy mayor of Brno with responsibility for health and housing.

[18] He was elected as a city representative, receiving 15,374 preferential votes),[19] also defending his seat on the Brno-sever district council.

[30] In October 2022, Hladík was nominated by the KDU-ČSL leadership to take over as Czech Minister of the Environment from Anna Hubáčková.

[36] On 28 February 2023, Fiala announced after a meeting with the newly-elected president Petr Pavel that Hladík would be appointed as Minister of Environment.

This vote was allegedly related to a doubly overpriced purchase of land belonging to the city of Brno from Hladík's acquaintance Martin Unzeitig.