Nicholas Isherwood is one of the leading singers of early music and contemporary music in the world today. He has worked with Joel Cohen, William Christie, Peter Eötvös, Paul McCreesh, Nicholas McGegan, Kent Nagano, Zubin Mehta and Gennadi Rozhdestvensky as well as composers Sylvano Bussotti, Elliott Carter, George Crumb, Hans Werner Henze, Mauricio Kagel, György Kurtág, Olivier Messiaen, Giacinto Scelsi, Karlheinz Stockhausen and Iannis Xenakis in prestigious venues around the world (La Scala, Covent Garden, the Théatre des Champs Elysées, Salzburg Festival, Concertgebouw, Berlin Staatsoper, Vienna Konzerthaus, Tanglewood). Operatic roles include "Antinoo" in Monteverdi’s Il Ritorno di Ulisse in Patria with Boston Baroque, "Claudio" in Händel’s Agrippina with Nicholas McGegan, "Satiro" in Rossi’s Orfeo and “Pan” in Marais’ Alcione with Les Arts Florissants, "Joas" in Porpora's "Il Gedeone" with Martin Haselböck, "Frère Léon" in Saint François d’Assise in the last composer supervised production, "Der Tod" in the two productions of Ullmann’s Der Kaiser von Atlantis with the Bach Akademie in Stuttgart and 2e2m, “Roméo” in Dusapin’s Roméo et Juliette at the Avignon Festival, “Lear” in Hosokawa’s Vision of Lear for the Munich Biennale, "Il Testimone" in Bussotti’s Tieste at the Rome Opera, “Micromégas” Mefano's Micromégas and "Lucifer" in the world premieres of Stockhausen’s Montag, Dienstag, and Freitag from Licht at La Scala and the Leipzig Opera and in Donnerstag aus Licht at Covent Garden. He has improvised with Steve Lacy, Joelle Léandre, Sainkho Namtchilak and David Moss,recorded 48 cd’s and appeared in three films. He has published an article on Scelsi the journal of the Scelsi Foundation. His article on the vocal vibrato will be published next year in the Journal of Singing in 2007 and his book The Techniques of Singing will be published in 2008 by Bärenreiter Verlag. He has been visiting professor of singing at SUNY at Buffalo, Notre Dame and the Ecole Normale de Musique and taught master classes in venues such as the Paris Conservatoire, Salzburg Mozarteum, Milan Conservatory and Stanford.