After relocating to New York in 2003, Guillermo Vaisman was appointed Music Director of the United Nations UNSCR Singers in 2004, an avocational group of UN employees which specializes in international folk music and tries to convey the central messages of the UN through concerts and concert tours.
He is a founding member of the Argentine Association of Choir Conductors (ADICORA), member of the International Federation for Choral Music (IFCM) and a member of the American Choral Directors Association (ACDA). He founded Cappella Buenos Ayres in 1994 and was its conductor until December 2002. In New York, he founded the chamber choirs Canopus Singers in 2005 and later Cappella Sur, mixed groups focusing on the choral literature of South America and Spain.
Over the past 30 years, Maestro Vaisman has conducted more than 600 concerts in Argentina, China, Germany, Italy, Japan, Philippines, Spain, Switzerland, the United States and Uruguay, with repertoire including a cappella works from the entire breadth of choral literature, and especially traditional choral and folk music of South America.