[3] As a student she became a leading figure of the LGBT activist organizations Queer Leaders Forum and Q-centrum.
[2] In 2010 she became the chief organizer and spokesperson of the Bratislava pride march and one of the most outspoken defenders of LGBT rights in the Slovak public sphere.
[4] In 2013 Schlesinger was approached by the Member of the National Council of Slovakia Martin Poliačik with an offer to join his Freedom and Solidarity party, which at the time aimed to portrait itself as a champion of civil rights.
[6] In 2015 Schlesinger was among the most outspoken opponents of the unsuccessful effort of conservative organizations to enshrine the ban of same-sex marriage in the constitution through a referendum.
Schlesinger cited this pressure and the associated mental stress as a reason for abandoning activism and withdrawing from public life in 2019.