In 1976, he met Millán Salcedo and Fernando Conde at the Real Escuela Superior de Arte Dramático, where the idea of forming the trio Martes y Trece emerged, which was realized in 1979.

In 1988, he co-hosted the New Year's Eve gala and the countdown on La 1 of Televisión Española (TVE) alongside Millán Salcedo.

The only exception was in 1993 when they were replaced by Los Morancos—the duo Cruz y Raya hosted the subsequent gala—after Josema and Millán's resignation.

On television, he worked on the series Todos los hombres sois iguales, a comedy aired by Telecinco based on the film of the same name, where he plays a divorced man living with two other divorced friends, and in the series Mediterráneo.

In 2019, he participated in the New Year's Eve special organized by José Mota, where he appeared alongside his former "Martes y Trece" partner, Millán Salcedo.