sentences:  During his tenure at the Secretariat of Agriculture, he wrote the book "La Modernizacion del Sector Agropecuario y Forestal", where the (1998–1994) administration's objectives with respect to the agricultural sector are laid out ().He is also a member of the advisory board for the Mexico Institute.When the PRI lost the Mexican presidency in 2000, Téllez joined the private sector as Executive Vice President and CEO of "DESC, S.A. de C.V." Later on he joined The Carlyle Group as Managing Director, focusing on buyout investment opportunities in Mexico.