In 1972, the businessman Mario Lopez Estrada founded Constructora Maya, an independent construction company.
According to a financial report in Bloombergs website, from 1986 to 1991 he worked as Ministro de Comunicaciones, Infraestructura y Vivienda (Minister for Communications, Infraestructure and Housing) during the first democratic government in Guatemala, with expresident Vinicio Cerezo Arevalo. Mario Lopez Estrada ventured the aggressive telecommunications Business in 1993. Since that time he has made Tigo Guatemala the number 1 teleccommunications company in the country.
Mario Lopez Estrada is the founder and President of the Board of Directors of Tigo Foundation. According to its website, Tigo Foundation is dedicated to support children in Guatemala with Health care, education and Sports. Their website also cites that from its foundation in 2009 to 2017, 250 schools have been built in the rural areas in Guatemala.
He is the President of Tigo Guatemala, that country's largest mobile phone Service provider with more than eight million users and market share of over 54%. In early 2013, Tigo promoted adoption of smartphones by its users; it started by selling 30,000 smartphones per month, then in late 2013 100,000 per month, and in late 2014 sold 150,000 per month.
They also published in December 2015 that the American Embassador, Todd Robinson invited private sector members, among them representatives of Tigo Foundation to visit different USAID projects being held in Quiche. From this visit, Tigo Foundation started an initiative called CEPROCAL (Caprine Production of the Highlands) in Nebaj and its part of the PAISANO project with Save the Children Guatemala.