He began his career in 2003 by releasing an album of spiritual hymns, Ila ssama atba’ouka, before founding his own label, Falak Productions. His debut album, Ya Zaman (Ô Good Old Days), was released in 2011 to critical acclaim, praising the nostalgic melodies of the East, the rigorous harmonies of baroque, and the elemental roots of jazz rhythms. A collaboration between 32 Lebanese and Belgian musicians, Ya Zaman peaked atop of the Lebanese charts, earning Massy the Murex d'Or (Golden Murex award) for "Innovation in Music" in 2012.