[2] He was especially inspired by The Lion Hunt by Peter Paul Rubens,[2] a famous Baroque painting he meticulously copied by hand.

The reputation and skill of the group have led to numerous tours and choral premieres of works by composers such as Johann Christian Bach, George Benjamin, Luciano Berio, Anton Bruckner, Gabriel Fauré, John Harbison, George Frideric Handel, Ned Rorem, Peter Schickele, and Alfred Schnittke.

NYVS has premiered over 500 new works by notable contemporary composers, including Luciano Berio, John Harbison, Hans Werner Henze, Louis Andriessen, Shulamit Ran, George Perle, Ernst Krenek, Thea Musgrave, Jonathan Harvey, Arvo Pärt, and Andrew Imbrie.

[5] Throughout his career, Rosenbaum has been a patron of aspiring and accomplished American composers, commissioning well over 100 new compositions and bringing obscure works into the public eye.

His New York Virtuoso Singers also appeared on the Late Show with David Letterman on Millennium New Year's Eve, performing the finale of Beethoven's 9th Symphony with the Brooklyn Philharmonic.

[11] Over the years, Rosenbaum has worked extensively with an eclectic group of major artists, among them Robert Spano, David Lang, David Del Tredici, Stephen Schwartz, Charles Wuorinen, Sir Charles Mackerras, Lukas Foss,[12] Thea Musgrave, John Corigliano, Shulamit Ran, Julia Wolfe, James Conlon, Dennis Russell Davies, Leon Botstein, Michael York, Sir Jonathan Miller, Elliott Carter, and Milton Babbitt.

Ensemble, Continuum, Paul Taylor Dance Company, New York Youth Symphony, and the Brooklyn Philharmonic (59 times) and many others.

[13] In 2016, Rosenbaum conducted Roberto Sierra's Missa Latina[14] in a new arrangement he commissioned for choir, soloists, 24 percussion instruments and two pianos.