Mundruczó has worked in theatre and opera since 2003, first in Hungary and then in theatres abroad such as the Thalia Theater in Hamburg, the TR Warszawa, the Schauspielhaus Zürich and the Vlaamse Opera. He is most keen to begin new projects where he finds the subject, collaborators and venue inspiring. During the creative process, he strives to create a team. For new projects, he very often casts the same actors, who work with him as creative partners. It is with them that he devises the productions. After freelancing with more or less the same group of people for several years, in 2009, he founded Proton Theatre, his independent theatre company, with Producer Dóra Büki.