He served as the Minister of Foreign and European Affairs of Slovakia from May to October 2023.

Previously he served as Slovak ambassador to the United Kingdom from 2011 to 2015 and to Denmark from 2018 to 2022.

[1] Following his graduation until 1998, he worked with the think tank Slovak Foreign Policy Association.

Between 2001 and 2003 he was a foreign policy advisor to the Prime Minister Mikuláš Dzurinda.

[2] On 12 May 2023, the president Zuzana Čaputová announced Wlachovský will serve in the caretaker cabinet of Ľudovít Ódor as the Minister of Foreign Affairs.