Marcos is a well established multi-instrumentalist who has performed professionally on guitar, bass, mandolin, trumpet, banjo, congas, timbales, djembe, marimba, trombone, and drum-kit.

As well as touring internationally through Europe, Asia, and Central and South America, Marcos has performed coast to coast in Canada and the United States. He is also a professional sound engineer.

Some of the groups Marcos has played with include Ian and the Invalids (featuring Ian Blurton), The X-Men (featuring Marek Colek), Junglemilk (Bif Naked's first band), Ngoma (of which Marcos was founder, bandleader, and composer), Ache Brasil (Canada's first capoeira group), and The Carnival Band. Winter 2006 found Marcos playing drum-kit in the multiple Jesse award winning production of Urinetown, at the Firehall Arts Centre.

As a song writer/composer/arranger, his songs have appeared on commercials, in films, and on various radio stations. He is very proficient in music theory, has extensively studied world music and jazz, and has one of the largest private musical instrument collections in the city.