He worked with his father on a farm, and helped his mother in a small family-owned store, where he found the time to play the cuatro.
[2] When drafted into the United States Army in 1950, Rivera took along his cuatro instrument, with which he entertained the troops overseas during his free time.
He joined other musicians of typical genres from Puerto Rico, such as Florencio "Ramito" Morales Ramos, Jesús "Chuito de Bayamon" Sanchez Erazo, and Guzmán Rosario.
He returned to Puerto Rico and married Carmen Rosado, with whom he had two children, named Carmencita and Edwin Tomás.
[2] Rivera composed more than 1,000 instrumental compositions for the cuatro, including the danzas "A mi Madre" and "Nélida", also the décima Lo que Dios me ha Dado.
After his death, his hometown of Toa Alta honored his memory by naming a middle school and the Municipal Theater after him, and by commissioning a statue in his likeness.