Mariana says she was called by God to teach when she was a child. She studied educational psychology at the Central University of Ecuador and has a degree in Educational Administration and Supervision from the University of Guayaquil (Ecuador). Before joining Alfalit, she taught second, third and fourth grade. She has worked with Alfalit since 1975 and has been the director for over 20 years. She is a hand on director and has traveled from inner cities to the fields in rural areas in her country, teaching and supervising literacy and education for thousands of youth and adult Ecuadorians who have learned to read, write and improve the quality of the lives through the Alfalit programs.
Mariana is married to the Rev. Estuardo Lopez, they have three children and three granddaughters. She is a Coordinator of the Union of Evangelical Women, and a member of the Network for Integral Christian Transformation and Sustainable Development Committee for Emergency in Ecuador.