Her research focuses on South Slavic drama, post-communist theatre, and performance theory. She has contributed to The Routledge Companion to Dramaturgy (Routledge, 2015), From Exsilium to Exile: Forced Migrations in Historical Perspective (Studia Historica Gedanensia, University of Gdansk Press, 2014), International Women Stage Directors (University of Illinois Press, 2013), Performing Worlds into Being: Native American Women’s Theatre (Miami University Press, 2009), and Theatre and Performance in Eastern Europe: The Changing Scene (Scarecrow Press, 2008). She has also published in TheatreForum, Slavic and East European Performance, Slavic Studies, Balkanistica, and others. Warner is the dramaturg for Overground Physical Theatre Company in New York City, and has served as president and vice president for the Bulgarian Studies Association since 2013.