He was elected on June 25, 2013, at the 28th General Assembly and Conventions in Indianapolis, Indiana. Prior to his election as general superintendent, Busic served as the president of the Nazarene Theological Seminary in Kansas City, Missouri. Busic graduated from Southern Nazarene University with a Bachelor of Arts degree in religion and from Nazarene Theological Seminary with a Master of Divinity.
In May 2010, Southern Nazarene University awarded him an honorary Doctor of Divinity degree. As of 2013, he was also pursuing a Doctor of Ministry degree in Theology and Culture from Fuller Theological Seminary. Busic is the author or co-author of numerous books and articles.
From 2000 to 2007, he served as co-editor of Preacher's Magazine: A Preaching Resource in the Wesleyan Tradition. His other books include A Pastor's Guide to Effective Preaching, Sharing My Faith, Perfectly Imperfect: Character Sketches from the Old Testament, and Perfectly Imperfect: Character Sketches from the New Testament (forthcoming in 2014).