Since 1954 SIBMAS has been the forum for colleagues from all over the world promoting research, practical and theoretical, in the documentation of the performing arts. Besides the organisation of biennial international congresses, SIBMAS members are involved in three permanent projects: a directory of theatre museums and libraries accessible online since 2002, the International Bibliography of Theatre (IBT), published by the Theatre Research Data Centre at Brooklyn College of the City University of New York, and the World Encyclopaedia of Contemporary Theatre (6 volumes, 1994-2000). The executive committee comprises 16 elected members, presently representing Europe, North America and Australia. SIBMAS institutional members include universities and university departments, libraries and museums specialising in performing arts documentation.
The SIBMAS member for Slovenia is the National Theatre Museum of Slovenia.