Zavala worked for the private law firms Estrada, González y de Ovendo and Sodi y Asociados. Zavala was a Deputy of the Legislative Assembly of the Federal District between 15 September 1994 and 14 September 1997.
Zavala worked for private law firms Estrada, González y de Ovendo and Sodi y Asociados, and was a Deputy in the Legislative Assembly of the Federal District from September 15, 1994, to September 14, 1997.