The UN Singers Leadership

Get to know our Conductor and Executive Committee. 


Guillermo Vaisman Conductor and Music Director  

Originally from Entre Ríos, Argentina. Choral conductor, accordionist, arranger, and teacher. After relocating to New York, Guillermo Vaisman was appointed Music Director of the United Nations Singers in 2004.

He is a founding member of the Argentine Association of Choir Conductors (ADICORA), a member of the International Federation for Choral Music (IFCM) and a member of the American Choral Directors Association (ACDA). 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, the Philippines, Spain, Switzerland, the United States, and Uruguay.

He conducted the world premiere of the "Preamble for Peace", commissioned by the United Nations Singers, at the opening of EXPO 2010 in Shanghai.

Maestro Vaisman is invited regularly as an accompanist to the young “Tarumi Violinists”, both in the USA and Japan. In 2012 he had the honor of conducting the UN Singers in performances with the Japanese singer and songwriter Tokiko Kato at Carnegie Hall and in Hiroshima, Japan. He appeared again at Carnegie Hall in 2016 conducting the Children’s Choir Redes USA.

At present, he is also Cantor of the congregation Sion Iglesia Luterana in Manhattan, New York. Apart from his choral activities, Guillermo Vaisman is an active musician on the New York tango scene, regularly performing at the Summer Tango Festival in Central Park and at venues throughout the city.


Marie Deblonde-Vallet President

Marie Deblonde-Vallet President

Marie Deblonde-Vallet has been a chorister for more than 15 years. She sang with the Youth Choir of La Monnaie Opera House of Belgium and in various university choirs. She joined the UN Singers in April 2015. She is currently working with the Capacity-Building Unit of the Office of Counter-Terrorism. Before joining the UN, where she has been working for OCHA for the Central Emergency Response Funds in the Resource Mobilization and Communication section and for DGACM, she worked in Vienna, Strasbourg, Brussels and Luxembourg as a translator, editor and journalist. She has a degree in multidisciplinary translation and speaks 7 languages.


Charles Appel Vice President

Charles Appel Vice President

Gracious. Charismatic. Committed: Three things that sum up Chuck's journey with the UN Singers. Chuck Appel first joined the UN Singers in 1974 and has served in almost every committee post except Treasurer since then.  During his tenure as President from 2008-2010,the UN Singers traveled and performed in the Basque region of Spain, Japan and China. Recently retired after 38 years at the United Nations, Chuck worked for the Department of Public Information in Film, Video production and UN Radio. His most satisfying accomplishment was serving as Chairman of the UN Polling Officers for UN Staff Council elections in 2001/2002.


Silvia Cristina Carvalho Treasurer

Silvia Cristina Carvalho Treasurer

Silvia Cristina Carvalho is a Senior Transport Officer for the UN Department of Field Service/ Department of Peacekeeping Operations. She experiences challenges that demand a flexible and creative problem solver with a proven ability to operate in demanding environments and in multicultural settings. 

For Silvia, singing with the UN Singers brings a unique sense of togetherness. Being part of the collective endeavor strengthens her feeling of cooperation. The choir provides joy, a wonderful release from daily stress, and an opportunity to express thoughts and feelings through music.  

As a dual-national from Brazil and Portugal, in her youth Silvia participated and travelled with a youth choir as a soloist, an experience that made all the difference. Being part of the UN Singers is an opportunity to enjoy a sense of belonging and of social inclusiveness, engendering a positive and rewarding sense of community. Ultimately for her, singing is not only gaining musical and cultural benefits but enjoying, in a magical way, the process of gaining skills, knowledge, and understanding of the nature and place of music in her life and that of others.

 


Anna Dzhenkova Personnel Officer

Anna Dzhenkova Personnel Officer

 

Anna grew up in a family of musicians: her grandparents were choir conductors and professors at the Tchaikovsky National Music Academy of Ukraine in Kyiv. She graduated from the school of music majoring in piano when she was 13. Anna participated in numerous contests and became a finalist in a nation-wide jazz contest. She took voice classes at the School of Jazz and Pop Art in Kyiv before she moved to New York to work in the Special Events team of the United Nations Department of Public Information. Anna joined UNSRC Singers in 2016 and has been in charge of membership and internal communications in her capacity of a Personnel Officer.


Carlo Zenarosa Public Relations Officer

Carlo Zenarosa Public Relations Officer

Carlo Zenarosa started with music in grade school where he played 8 different musical instruments. He played guitar then stand-up bass with the Guitar Ensemble in De La Salle grade school. He was the grade school commencement exercise/graduation mass pianist-accompanist. He received the AMASFI Music Award then. In high school he conducted the La Salle Green Hills High School Band as requested by the assistant bandmaster when the primary bandmaster was absent. He was the musical director in a play in high school. Later on he formed a cover pop band playing bass guitar. He has completed Music Certification in both the Specialist and Professional level with Berklee Online and is currently finishing up a Masters Certificate in Music Theory, Harmony and Ear Training with the same college. He first joined the UNSRC Singers in 2015 as an add-on to the 70th Commemoration of the Hiroshima-Nagasaki bombings in Japan. He has never left since. He currently sings as a baritone for the UNSRC Singers. His active participation as club photographer and videographer posting on social media landed him a spot as PRO.