In 2000, he completed his MFA (Master in Screenwriting) at the prestigious American Film Institute in Los Angeles, and was hired by Sony Pictures International Television adapting formats for the Hispanic market.

One of the most successful formats was the creation and development of Bienvenida Realidad[9] a television series commissioned by Sony Pictures.

[9] and acquired by TVN, Cadena 3, RCN, Sony Spin (US), Rede CNT Brasil and Teleamazonas Ecuador among others.

Hernán then began a prolific career as Head of Development[10] and Showrunner for hit series such as "La Colonia", "El reemplazante",[11] "El diario secreto de una profesional", "Casado con Hijos",[12] "Tiempo Final", "La Nany", "Tres son Multitud"[13], "Cartas de Mujer", "Manual de Galanes"[14] among others .

[17] He was also the Creator and Executive Producer of the successful show Papá Mono, currently on Amazon Prime and reaching 32 share points on Network Television, Channel 13.