Byron Klaus was formerly the president of the Assemblies of God Theological Seminary (AGTS). Prior to that, he served for 20 years on the faculty and administration of Vanguard University in California. During that time, he was the vice president of Latin America Childcare (currently known as ChildHope), a child development ministry which, at that time, helped over 80,000 children in 21 nations in Latin America and the Caribbean. He has also served in the churches of California, Texas, and Illinois.

Prof Byron received his BSc from Bethany Bible College, MRE from Southwestern Baptist Theological Seminary, and DMin from Fuller Theological Seminary. His commitment to leadership development in growing churches around the world has taken him to over 50 nations in the world, where he preaches and develops leaders. Among his wide spectrum of scholarly works are Called and Empowered: Pentecostal Mission in Global Perspective (1991) and The Globalization of Pentecostalism: A Religion Made to Travel (1999), which he co-edited.

After his retirement from the presidency of AGTS, Prof Byron continued to teach courses at seminary and returned to ChildHope to be its vice president. He received the Distinguished Educator Award from the Alliance for Assemblies of God Higher Education in 2009, and the Lifetime Achievement Award from the Society for Pentecostal Studies in 2016.