Mario Schwarz was born in Trun in the canton of Grison. He completed his musical studies at the Academy for School and Church Music Lucerne (conducting, school music, organ and voice) under the tutelage of Ernst Pfiffner, Alois Koch and Josef Röösli. He continued his studies under Helmuth Rilling at the School of Music and Performing Arts in Frankfurt and attended master courses lead by R. Kubelik, G. Schmid-Gaden and H. Rilling.
Mario Schwarz became famous through his many world premieres - particularly with works by Swiss composers. He is the director of the Collegium Musicum St. Gallen, the Oberthurgau Chamber Orchestra and the Collegium Cantorum St. Gallen. He has a particularly wish to advance the training of choir singers and conductors, for whom he offers, in his Choir Studio, courses in choir singing, voice training, solo singing and conducting.
He heads the 'Orchesterwoche' in combination with a conducting course at the Hotel Laudinella, St. Moritz. Since 1985 he performs concerts within the framework of the International Lake Constance Festival (Bodenseefestival). His particular attention is focused on the discovery of new and old rarities, which has led for example, to the performance of the forgotten oratorios 'Der heilige Gallus' and 'Judith' by Carl Greith. Mario Schwarz has performed for various TV (DRS, SWR 2, ORF, Hessischer Rundfunk) and CD recordings.
In 1999 he founded the Collegium Cantorum, a vocal ensemble consisting of professional singers. Together with this ensemble and in collaboration with the South West German Philharmonic, he published, in 2002, his first ever CD recording with Missa Solemnis by Joseph Haydn. In 2004 he conducted the world premiere of Gion Antoni Derungs' opera 'Tredeschin'. In the same year he received the recognition prize offered by the canton of Grison.