Board of Trustees

Thurston Hamer ('81) - Chair

Thurston Hamer was born in Mexico City and attended The American School. He graduated from Southern Methodist University in 1986 with a bachelor of arts in advertising. His professional career has encompassed various business planning and development, marketing and general management roles. He is currently the chief operations officer for Distribuidora de Impresos S de LR de CV (Dimsa), a national periodical distribution company based in Mexico City. Thurston has been active on the boards of important associations in Mexico, currently serving as secretary and president of the Image Committee for Fomento Educacional, AC. He has also participated as a director-at-large of The American Society of Mexico (2005-2007) and a member of the Communications Advisory Board of the American Chamber of Commerce (2003-2005). He also serves on the ASF Governance Committee. He and his wife Angelina have one son at ASF.

John Anthony Santa Maria Otazúa ('75) - First Vice Chair

John was born in New York City but was raised in Mexico City since age seven. He graduated from The American School Foundation, where he proudly participated on the football and basketball teams as a “Fighting Bear.” He received his B.A. and MBA from Southern Methodist University in Dallas, Texas. John was a member of McKinsey & Company for three years, practicing in the Mexico and New York City offices. While in New York, he joined PepsiCo Inc., and spent over a decade in the beverage division living in New York, London, Venezuela and Mexico City. Currently, John is president of Coca-Cola FEMSA South America, and has served as chief operating officer for the Mexico division as well as strategic planning and commercial development officer for the company. John and his wife Ana Cecilia have four children at ASF.

Leonardo Franco Schlesinger - Second Vice Chair

Leo Schlesinger has an MBA from London Business School and completed courses at Yale and Harvard. Leo begun his career in 1992 at Sun Chemical in NY and then joined Citigroup's Global Leadership Program in NY which took him to Santiago, Sao Paulo and London. Since then he has worked in banking, insurance and private equity and led PE backed companies in Latin America, from Gruponueva Fund (Masisa, Amanco, Plycem) and Tresalia Capital where he now is the CEO of Aliat Universidades; one of the largest private higher education groups with presence in 17 Mexican states, 50 campuses and more than 55,000 students. In 2010 he was recognized as a Young Global Leader by the World Economic Forum. He is on the board of the Young Presidents Organization and was chairman of the World Economic Forum Global Agenda Council on Natural Capital in Davos, as well as participating in other for and nonprofit boards. Leo Is married to Rocio and they have two children studying at ASF.

Mark Matthew McCoy MacDonald - Treasurer

Mark was born in Mexico City and graduated from the American School Foundation. He received a Bachelor of Science degree from Babson College and a MBA from Columbia Business School. Mark worked for Citibank’s Corporate Bank in Mexico City and for Citigroup’s Investment Banking Division in New York for a total of ten years. He is the CEO of Banco Finterra, S.A., Institución de Banca Múltiple. Mark and his wife Beatriz have three children, two of whom currently study at ASF.

Rosa Marentes de Pisinger ('87) - Secretary

Rosa Marentes de Pisinger was born and raised in Mexico City and graduated from The American School, where her mother was a teacher for 25 years. Rosa holds a bachelor’s degree in pedagogy from the Universidad Intercontinental and a master’s in education from Endicott College. From 1993-1995 she taught Mexican history, philosophy and “derecho” in the Upper School. She actively participated in the ECC as a homeroom parent and volunteer for the Junior Great Books program. This is Rosa’s tenth year on the Board of Trustees. Rosa and her husband Diego (’84) have two children at ASF.

César Buenrostro ('85)

César Buenrostro Moreno was born in Mexico City and graduated from ASF. He is an architect from Universidad Iberoamericana and attended the Harvard Graduate School of Design Professional Development Program ('97, '98, '99). He is director of his own construction and project management firm in Mexico City. From 2002 to 2006, he served as special projects coordinator for the Mexico City Secretary of Transportation and Roads. At ASF, he chaired the Alumni Council, participated in the Endowment Fund Committee and is currently the chair of the Buildings and Grounds Committee.

Thomas R. Favret

Mr. Favret, a senior member of the U.S. Foreign Service, arrived in August 2018 as U.S. Embassy’s minister counselor for management affairs. Prior to this assignment, he served in the same role at the U.S. Embassy to Canada in Ottawa. In 2015, he received a Master of Sciences degree from the National Defense University (NDU) in Washington DC, where he was a distinguished graduate of the Dwight D. Eisenhower School of National Resource Strategy. Thomas came to NDU from the U.S. Embassy in Kabul, Afghanistan, where he served as deputy director for the Ambassador’s office of transition. Mr. Favret entered the Foreign Service in 1992, with an initial tour in Warsaw Poland as a consular officer. He has also served in Washington, DC and in U.S. embassies in Abuja, Nigeria; Prague, the Czech Republic; Rangoon, Burma (Myanmar), Zagreb, Croatia; and Brussels, Belgium. He grew up in Silver Spring, Maryland, one of eleven children. He received a Bachelor of Arts degree from Catholic University in Washington, DC. He speaks Polish, Spanish, Serbo-Croatian, and French. Mr. Favret is married to Sylwia Favret. They have three children.

Ernesto González Garfias

Ernesto is Managing Director at Macquarie Infrastructure and Real Assets (MIRA) based in Mexico City and is Chief Executive Officer of Macquarie Mexico Infrastructure Fund. Mr. González Garfias has over 17 years’ experience as an energy executive in operating companies and has executed project financings and investments with an aggregate value of over $8 billion. Prior to joining MIRA, he was a founding member and Executive Vice President of Business Development of ContourGlobal based in New York, where he was responsible for the development of greenfield power projects and the acquisition of operating power plants. During his tenure at ContourGlobal, the company expanded to assets exceeding $3.5 billion from 36 power plants in 21 countries with an installed capacity of nearly 4 GW and over 1,500 employees. Previously, he also held positions with The AES Corporation and Credit Suisse. Mr. González Garfias received a B.S. in Finance from Texas A&M University. Mr. González Garfias and his wife, Viviana, have two children attending ASF.

Patricio Gutiérrez Tommasi

Patricio has more than 25 years of experience in planning, development and operation of projects and investments. He has ample experience in structuring and managing private capital portfolios with national and international partners. He has a civil engineering degree from Universidad Iberoamericana and a master’s in engineering from Stanford University (Fulbright Scholar). He is an active member of Urban Land Institute (ULI), Asociación Mexicana de Parques Industriales Privados (AMPIP), the International Council of Shopping Centers (ICSC) y Stanford Professionals in Real Estate (SPIRE). He has been with Artha Capital since its foundation. He is also a member of the investment committees for different funds and actively participates in the strategic planning for Artha Capital.

G. Troy Hatch

Troy is responsible for all legal and regulatory matters for AT&T’s business activities in Mexico. Troy has extensive experience providing advice and counsel in connection with complex domestic and international corporate and commercial matters in the telecommunications and oilfield services industries. He speaks English and Spanish, and has been practicing law since 1991. Prior to his current role in Mexico, he was responsible for regulatory and competition law approvals in Latin America, pre-merger integration planning for the DirecTV acquisition and for AT&T’s emerging business market activities. He was also previously responsible for certain merger and acquisition activity in the wireless sector supporting AT&T Mobility’s growth in the US, and certain strategic legal matters at AT&T. He is a member of IDET (Mexican Institute of Telecommunications Law) and frequent speaker at events of the BMA (Mexican Bar), ANATEL (National Association of Telecommunications of Mexico) and the organization of Women Lawyers of Mexico (Abogadas MX). Troy graduated in 1987 from Brigham Young University with a Bachelor of Science degree in Business Management – Finance and received his JD in 1991 from the University of Houston Law Center. Troy and his wife, Anne, have three children attending ASF.

Andrea Hernández Velasco

Andrea Hernández was born and raised in Mexico City. She has a bachelor’s degree in international relations from Universidad Iberoamericana. Since 2010, Andrea has been a founding member and co-chairwoman of Fundación Legorreta Hernández, A.C. She is also a co-founder and chairwoman of Fundación Pedro y Elena Hernández, A.C. Because of her special interest in the healthcare and education, Andrea is a member of the board of various institutions. Since 2010, Andrea has participated in school activities as a homeroom parent, as a member of ASF Parent Association and, for the past five years, as the liaison between the ASF Parent Association and the Lower School leadership. Additionally, she is a member of the Institutional Advancement Community Council.

Carl E. Koller Lucio (‘88)

Carl is an attorney-at-law, admitted to practice in Mexico (1994) and New York (1998), specializing in Mexican federal taxation and international taxation. After initial law work in other fields, including civil and commercial litigation, he started his tax practice in 1996, concentrating on federal tax litigation. Over the years, he steadily migrated to consulting-focused and tax controversy practices, which currently occupy most of this time. Career highlights include handling cases that set first precedents in Mexican Supreme Court litigation and contributing to successful lobbying efforts against governmental initiatives that would have been deeply detrimental to taxpayers’ rights. Special areas of practice focus include corporate law compliance. He has been acknowledged as a leading tax attorney in Mexico by various publications. Mr. Koller has an LLB (ITAM, Mexico City, 1994) (cum laude); an LLM (Duke University, US, 1995); and an MBA (full-time degree, Mannheim Business School, Germany, 2012) (cum laude). Currently he is a partner at Turanzas, Bravo & Ambrosi. Carl and his wife, Alicia, have three children attending ASF.

María Novales-Flamarique

Maria Novales-Flamarique was born in Maryland, USA and was raised in Montreal, Canada. She has a bachelor’s in finance from HEC Montreal and an MBA from London Business School. Maria is a former McKinsey & Company partner having worked in its Madrid, London and Mexico offices and is currently the head of McKinsey Social Initiative México, a non-profit organization that seeks to solve for youth unemployment through education. She is also an independent board member at Scotiabank México. Maria has served The American School Foundation on its finance and human capital committees for the past year.

Juan Francisco Serrano Kacz ('79)

Juan heads JFStrategy, a company specializing in consulting services and market research in technology as it applies to business. JFStrategy has worked with a number of top companies including Televisa, IZZI, Alsea, Banco Santander, the German Chamber of Commerce in Mexico, and Banamex-Citibank. Prior to JFStrategy he was CIO at Televisa San Ángel, CIO for “The News” newspaper, director of technical support and sales at CompuServe Mexico, and consultant for the American Chamber of Commerce of Mexico. In 2003 he was one of the five members of the Science and Technology Council for the National Electoral Institute. He has been actively involved in projects like Domino’s online ordering in Mexico, Amcham’s Infocenter, and has helped in projects like a unified rewards program for retail restaurants, known as WOW rewards.

Frances Elizabeth Ward Patton de Huttanus

Frances Huttanus was born and raised in Gainesville, Georgia. She received a bachelor of science degree from The University of the Americas and came to The American School in 1970 as a student teacher. She later became involved in school activities as a homeroom parent, then as treasurer, vice president and board member of the Parent Association and chair of the Art Fair. She was elected to the Board of Trustees in 1986 and served for 11 years. Frances was reelected to the Board in 2007. Her efforts have been instrumental in establishing the programs for Services for Academic Success and financial aid, as well as numerous advancement activities. Active in the international community, Frances served on the board of directors of the Junior League of Mexico City, the Daughters of the American Revolution (DAR) and presently serves as vice president of the American Benevolent Society. She spent numerous years as partner/director of design, development and manufacturing of home decorative accessories for export to the U.S. and Europe. Frances is married to Juan Huttanus Tazzer and has two children: Rodrigo (’91) and Leonor (’95). She is chair of the Institutional Advancement Committee.