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Jose Luis Guerrero Alvarez has been a member of our board of directors since 1990. Mr. Guerrero is our Executive Vice President and Chief Financial Officer. For the past 26 years Mr. Guerrero has held various positions in our finance, administrative, divestment, real estate, manufacturing and business development areas. Before joining us, Mr. Guerrero was the Planning Director at Combinado Industrial Sahagun, the Technical Director at Roca Fosforica Mexicana and held various other positions in Mexico and abroad. Mr. Guerrero holds a diploma D’Ingenieur I.S.M.C.M. from Institut Superieur des Materiaux et de la Construction Mechanique of Paris, France. M.S. and a Ph.D. in Engineering from the University of Illinois at Urbana-Champaign. | 