In 1993, Niedziałkowski returned to Warsaw, Poland. In 1994, he took the position of artistic director of the Warsaw Pantomime Theater at the State Jewish Theater in Warsaw. Simultaneously, Niedziałkowski founded The Mimes Studio (Studio Mimow) at the Warsaw theater, Teatr Na Woli. From 2000 to 2002 and in 2004 Niedziałkowski was the author and artistic director of The International Mime Art Festival at the Teatr Na Woli theater. In 2005, Stefan Niedziałkowski's Mimes Studio moved to its current location at the Mazovia Region Centre of Culture and Arts in Warsaw.