She has composed music for theater presentations as well as for many educational videos of Uruguay, Brazil, the United States and Spain, receiving various prizes in recognition of her work.
She has also worked as musical producer for the first CD of ceremonial songs of the Shuar Indians, descendants of the Jibaros of the Ecuatorial Amazonia, interpreted by Medicine men.
For the last two years she has been traveling around the world interviewing artists, teachers, therapists and common people for a non-profit documentary called "Tuning the Instrument".
Mariana's compositions have been recorded by: Mariana Cincunegui, Magdalena Fleitas, Susana Ratcliff (Argentina), Jorginho do Trumpete (Brazil), L'Antoniano di Bologna (Italy), Sara Hjáltested (Iceland), Latin Lover (Sweden), Rubén Rada, La Botija's Band, Lágrima Ríos, Cristina Fernández and Washington Carrasco, Delanuka, Las Tres, Coco Fernández, Patakín, Gustavo Ripa, Liese Lange, La Otra, different carnival groups like Murga Falta y Resto, Curtidores de Hongos, Contrafarsa and La Gran Muñeca, among others (Uruguay), the Choir of the University of Rio de Janeiro, GM Choir of Los Angeles, Choir of the University of Uruguay, among others.
She has brought her music to various continents, sharing the stage with: João Gilberto, Chico Buarque, Fito Páez, Clark Terry, James Moody, Leny Andrade, Alcione, Kit Walker, Paquito D'Rivera and Dave Samuels, among others.