The son of pioneering comic actor and producer Tommy Muñiz, Rafo"s acting career began in the role of "Miguel" in "Gloria y Miguel", which aired on WAPA in Puerto Rico. After graduating high school, he starred alongside his father as his father"s son in law in the sitcom Los García (The Garcias), also on WAPA, during the late 1970s.
From there on, Rafo had on and off work as an actor, but by 1985, he had become a game show host at WAPA-television By that era also, he established a company named Promotores Latinos, where he performs as company President and main show producer. Promotores Latinos is now known as ProLat Entertainment. Since the 1980s, Muñiz has been one of the top music promoters/managers in Puerto Rico, and his firm represented such artists as Jennifer Lopez, Rubén Blades, Olga Tañón, Gilberto Santa Rosa, and others in their concerts in Puerto Rico, Venezuela and Panama.
Tanon split from his company in 2002, and Muñiz sued her for breach of contract.
He quickly signed another Merengue singer, Melina León and television personality, Silverio Pérez, to be represented by him. Some of his projects in the mainland United States. include "ViVa Puente" a star-studded tribute to the late Puerto Rican superstar Tito Puente in New York, Los Angeles, Miami and Dallas.
He has produced concerts at Carnegie Hall, Lincoln Center, and the Jackie Gleason Theater, among other venues. Currently, he is the manager of Gilberto Santa Rosa.
He has also represented Luis Raúl, a Puerto Rican stand up comedian and singer Jailene Cintrón.
