Poza was born on June 26, 1977 in Tulancingo, Hidalgo, Mexico. He started his acting career in the movie Bandidos in 1990, but his career as a TV actor started in 1992 in the telenovela El abuelo y yo along with Gael García Bernal. Then he got involved in other projects or more and less success.
In 2001 he worked in the novela Atrévete a olvidarme, which only lasted a month on air, but a couple of months later he was called by the TV produccer Carla Estrada to offer him a character in her new novela El Manantial. In 2002 he was called by another TV producer Pedro Damián and was offered his first starring role as professor Francisco Romero in the famous novela Clase 406.
Velo de novia in 2003 represented a new challenge for him, since he had to play two characters: twins Rafael and Ernesto, the first one bad and dominant and the other one good and shy. He also worked in theatre in the play P.D. tu gato ha muerto along with Otto Sirgo. Trying to get away from acting for a while, and hosted a morning TV show called Hoy which has being Televisa's morning show for years, changing the casts in different periods. during his period he worked with Andrea Legarreta and Vielka Valenzuela.
In 1997 he married actress Mayrín Villanueva, whom he met while filming the telenovelaPreciosa in that same year. Although they broke up in 2008, the couple had 2 children: Romina and Sebastián were born in August 2003.