He works as a lecturer and researcher at the Department of History of Art, Adam Mickiewicz University in Poznań, and lectures at the University of Fine Arts in Poznań.
He is a member of International Association of Art Critics.
Leszkowicz studied art history, gender studies and journalism at Adam Mickiewicz University in Poznań, Courtauld Institute of Art in London; and he was a Fulbright scholar at New School University in New York.
[1] In 2000, he defended his doctoral dissertation on Helen Chadwick at the Adam Mickiewicz University in Poznań.
Together with his partner Tomasz Kitliński he took part in Poland's lesbian and gay visibility campaigns Let Them See Us and Equal in Europe.