- Master of Arts (Religion/New Testament)- Southern Nazarene University (1978)
- Bachelor of Science (Mathematics)- Northwestern Oklahoma State University (1964)
- Additional Studies- Southwestern Seminary, Michigan State University, University of Colorado
Calvin is Director of the General Conference Missions Ministry and Vice-President of the International Ministerial Congress. Previously he served as editor of the Bible Advocate from 1997-2015 and was chairman of the writing committee for This We Believe: Teachings of the Church of God (Seventh Day). During over 50 years of ministry he has served as both instructor and director of Spring Vale Academy, Summit School of Theology and Ministries Training System. He brings with him a wealth of leadership experience, including a decade-long tenure as President of the General Conference, numerous terms as President of the North American Ministerial Council and pastoral ministry in Arkansas, Colorado, Oklahoma and Texas.