Oliver McMahan is professor of clinical mental health counseling and liaison to the president for institutional effectiveness and accreditation at Pentecostal Theological Seminary. He was the founder and is a core faculty member of the Master of Arts in clinical mental health counseling, a CACREP accredited program. He has more than 25 years of experience as a pastor, associate, evangelist, consultant, and seminar leader. He has been a member of the ATS Board of Commissioners, vice-chair of the redevelopment task force for the ATS Standards of Accreditation (2020), a former chair of the ATS Committee on Race and Ethnicity, and various other ATS projects and initiatives. He founded and directed the Seminary Counseling Center, has been a board chair and member for Behavioral Research Services in Cleveland, Tennessee, and has a private counseling practice. He has served on the editorial review board for the journal, Counseling and Values—the journal of the Association of Spirituality, Ethics and Religion Values in Counseling of the American Counseling Association. His published writings include Becoming a Shepherd (1995), Scriptural Counseling (1995), Deepening Discipleship (2000), The Caring Church (2002), The Caring Christian (2004), full quarter expositions in the Evangelical Sunday School Lesson Commentary (1982–2002), A Disciplined People, A Pentecostal Study of the Spiritual Disciplines, and was an editor and author for definitions and articles in the Complete Biblical Library (Greek and Hebrew) (1991). McMahan received his MDiv and DMin from Brite Divinity School at Texas Christian University and his PhD in counseling from Georgia State University.