In-house advisor, co-founder and retired partner of Chevez, Ruiz, Zamarripa y Cía, S.C., Member of the Audit Committee of Grupo Televisa. Member of the Board of Directors and Member and Chairman of the Audit and Corporate Practices Committee of Empresas Cablevisión (subsidiary of Grupo Televisa). Former Managing Partner of Ruiz Urquiza y Cia, S.C., representative of Arthur Andersen & Co. Member of the Board of Directors and Chairman of the Audit Committees of Regiomontana de Perfiles y Tubos, S.A. de C.V., Quality Tube, S.A. de C.V. and Pytco, S.A. de C.V.