Professor, Central American Theological Seminary (1970-1986)
Christian ministry and missions instructor at several schools, including Columbia International University, Dallas Theological Seminary, Trinity Evangelical Divinity School, Reformed Theological Seminary, and William Carey University
Visiting professor or lecturer, All Nations Christian College in the United Kingdom and the Asia Cross-Cultural Training Institute in Singapore
Otros aspectos destacados de la carrera
Global Ambassador, World Evangelical Alliance
Executive Director, Missions Commission for the World Evangelical Fellowship—oversaw work in 115 nations with 150 million Christians
Editor, Internationalizing Missionary Training,Kingdom Partnerships for Synergy in Missions, and Too Valuable to Lose
Staff, InterVarsity Christian Fellowship
Missionary, CAM International (1967-1985) – taught and served as a church planter and in pastoral ministry in Guatemala
Publicaciones
Crisis and Hope in Latin America, a book he coauthored with renowned Latin theologian Emilio A. Núñez