López Estrada studied Civil Engineering at Guatemala's San Carlos University.

[citation needed] From 1986 to 1991, he worked as Minister for Communications, Infrastructure and Housing during the government of President Vinicio Cerezo.

[2] In 1993, he acquired a share of Comunicaciones Celulares, the state-owned, monopolistic telecommunications company that was about to be privatized.

[3] Comcel became the country's largest mobile phone service provider and was renamed Tigo Guatemala.

According to its website, Tigo Foundation is dedicated to support children in Guatemala with healthcare, education and sports.