Ernesto Martens Rebolledo (born January 28, 1933 in , Veracruz) is a Mexican chemical engineer, who has occupied several high-profile business positions and was Secretary of Energy during Vicente Fox's government. He was born in a small town close to the Los Tuxtlas Biosphere Reserve in Veracruz. He received his bachelor's degree in chemical engineering from Tec de Monterrey, Campus Monterrey in 1956, where he met the founder of the school Eugenio Garza Sada. He did postgraduate studies in the in Germany and in Harvard Business School .