Professional Branches bring together members working in the same professional field or type of institution and meet as open forums to discuss common concerns and to exchange views and information.

At present there are five such branches:

• Archives and Music Documentation Centres
  Chair: John Shepard (email) (Rutgers University, New Jersey)
  Vice-Chair: Marguerite Sablonniere (email) (Bibliothèque Nationale de France, Paris)
  Secretary: Katharine Hogg (email) (The Foundling Museum, London)
  
• Broadcasting and Orchestra Libraries
  Chair: Jutta Lambrecht (email) (Westdeutscher Rundfunk Dokumentation und Archive, Köln)
  Vice-Chair: Martie Severt (email) (MCO - Hilversum)
  Secretary: Angela Escott (email) (Royal College of Music, London)
  
• Libraries in Music Teaching Institutions
  Chair: Anne Le Lay (email) (Médiathèque Musicale de Paris)
  Vice-Chair: Carlos José Gosálvez Lara (email) (Biblioteca del Real Conservatorio Superior de Música de Madrid)
  Secretary: Pia Shekhter (email) (Academy of Music and Drama, Göteborg University. Library)
  
• Public Libraries
  Chair: Hanneke Kuiper (email) (Public Library, Amsterdam)
  Vice-Chair: Kirsten Husted (email) (Vedle Bibliotek, Delling)
  Secretary: Corinne Brun (email) (Cité de la Musique, Paris)
  
• Research Libraries
  Chair: Joachim Jaenecke (email) (Staatsbibliothek zu Berlin, Berlin)
  Vice-Chair: Stanislaw Hrabia (email) (Jagiellonian University Institute of Musicology, Krakow)
  Secretary: Almut Boehme (email) (National Library of Scotland, Edinburgh)