After graduating from that school, de León became a staff member at Radio Caracas Television, where he studied acting further.

In 1989, de León played "Leonardo" in La Revancha ("The rematch"), a major Venevision hit.

After Kassandra, de León made three more telenovelas before he and his wife decided to accept offers by Mexico's Televisa.

He acted alongside Laura Flores, Julio Alemán, Raúl Araiza Jr., Niurka Marcos, Adriana Fonseca, Andrea Lagunes and Daniela Luján, among others, in that telenovela.

Around that time, his wife left Mexico to film a telenovela in Colombia alongside actor José Ángel Llamas.

("Long live the children") put de León with child star Andrea Legarreta and with Juan Ferrara.