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Deborah Martínez Rosengaus, is a  versatile Mezzo Soprano having studied Opera, Theater, Music and Dance, she is known for her exciting, high energy performances and for creating memorable and endearing characters. With a uniquely flexible voice, as comfortable in Verdi as it is in Rossini, she has delighted audiences around the world with her rich timbre and sparkling coloratura.
She has toured internationally, with a variety of musical ensembles in concert halls such as: Santori Hall in Tokyo, The Center for Performing Arts in Beijing with the Peoples Liberation Army Orchestra, Disney Hall with the Los Angeles Philharmonic, The Lincoln Center and Carnegie Hall. She has given recitals in Mexico and across the United States, giving voice to her research into the lesser known Art Songs of great Classical composers.

In the summer of 2008, she created the role of Principessa Louling under the baton of Bruno Riggacci in the World Premier of his one act opera “Dodici personaggi in cerca di voce.” She has recieved critical acclaim for her interpretation of Jo in Mark Adamo's Little Women and was nominated for a Theater Bay Area Award for the role of Ruth in Pirates of Penzance. With Ars Minerva, she has re-premiered 3 Operas that haven't been seen since their performances back in the Baroque. Other favorite opera credits include Cendrillon, Die Fledermaus, Hansel and Gretel, Candide, The Consul, Griffelkin by the late great Lucas Foss and West Coast premier of the new opera Miss Lonelyhearts. With Orchestra she has performed Handel’s Messiah and Brockes passion, Durufle’s Requiem, a variety of Handel Operas with Pocket Opera of San Francisco.


Ms. Rosengaus is the recipient of several awards including the Schoenfeld Award from the Holt Memorial Scholarship Competition and 1st place in the Pacific Musical Society Competition made famous by its first winner, violinist Yehudi Menuhin. 


Ms. Rosengaus holds a Master of Music Degree from the Manhattan School of Music, where she studied with international opera diva Mignon Dunn, and a Bachelors from the University of Southern California Thornton School of Music. She has performed in Masterclasses with Karen Morrow and Luana Devol. She is also a featured vocalist on several independent film soundtracks.

Past Productions

Frida, Rodriguez                                                        Woman 2                                                                 Opera Cultura 2022

Messalina, Pallavicino                                          Claudio                                                                           Ars Minerva 2021

Gianni Schicchi, Puccini                                       Zita                                                         Livermore Valley Opera 2021  

Macbetto, Verdi                                                          Lady in Waiting                                              West Bay Opera 2021

Ermelinda, Freschi                                                   Armidoro                                                                      Ars Minerva 2019

Il Barbiere di Siviglia, Rossini                             Berta                                                     Livermore Valley Opera 2019

Little Women, Adamo                                            Jo                                                                           Island City Opera 2019
Pride and Prejudice, Mechem                           Lady Catherine                                    Redwood Symphony 2019

Pirates of Penzance, Gilbert & Sullivan        Ruth                                                                             Lamplighters 2018

The Bartered Bride, Smetana                            Hata                                     Pocket Opera of San Francisco 2018

La Sonnambula, Bellini                                          Teresa                                                                Island City Opera 2018

Man of La Mancha, Leigh                                      Aldonza                                       North Bay Stage Company 2017
Yeoman of the Guard, Gilbert & Sullivan    Dame Curruthers                                                Lamplighters 2017

The Consul, Menotti                                                  Mother                                            Berkeley Chamber Opera 2017
Le Nozze di Figaro, Mozart                                     Marcellina                                        Livermore Valley Opera 2017 
Macario, Rodriguez                                                   Mujer de Macario                                                Teatro Vision 2016
Cunning Little Vixen, Janacek                           Lapak/Woodpecker                                 West Edge Opera 2016   
Eisler Hollywood Songbook                                 Ghost                                                                                    SongFest 2016
River of Women, Aramienta                                Maria/La Llorona                                               Opera Cultura 2016
Ruddygore, Gilbert & Sullivan                             Mad Margaret/Hannah                                  Lamplighters 2016
Tolomeo, Handel                                                         Alessandro                                          Handel Opera Project 2016
Hansel and Gretel, Humperdinck                     Witch                                                                               Solo Opera 2015
Man of La Mancha, Leigh                                        Aldonza                                        Los Altos Stage Company 2015
Le Nozze di Figaro, Mozart                                      Marcellina                                  Berkeley Chamber Opera 2015
H.M.S. Pinafore, Gilbert & Sullivan                      Buttercup                                                                Lamplighters 2015

Chitty Chitty Bang Bang, Sherman                  Truly Scrumptious                Los Altos Stage Company 2015

Curtains, Kander & Ebb                                            Jessica                                                                Hillbarn Theater 2015
Alcina, Handel                                                                Bradamante                  Pocket Opera of San Francisco 2015
Gianni Schicchi, Puccini                                          Zita                                                                               Waffle Opera 2015
Les Troyens, Berlioz                                                     Anna                                                          Kent Nagano Project 2015
Candide, Bernstein                                                     Old Woman                                                            Lamplighters 2015
Hansel and Gretel, Humperdinck                      Witch                                                                               Solo Opera 2014
Agrippina, Handel                                                        Nerone                              Pocket Opera of San Francisco 2014
Hansel and Gretel                                                        Mother                                                  Notre Dame de Namur 2011
L’Italiana in Algeri                                                         Zulma                                 Pocket Opera of San Francisco 2011
Dodici personaggi in cerca di voce                  Principessa Louling             IIVA,  BrunoBruno  Rigacci 2008

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