Stephen O. Moshier (PhD, Louisiana State University) is professor of geology and chair of the geology and environmental science department at Wheaton College, where he also serves as the director of the Black Hills Science Station. Besides his work in academia, he has also practiced geology as an oil company explorationist, with much of his early research describing and interpreting oil reservoir rocks. More recently, his research efforts are in the field of geoarchaeology, participating in expeditions to the Sinai coast, Egypt, and Israel.

Moshier has served as past president of the Geological Society of Kentucky and the Affiliation of Christian Geologists and currently serves on the Executive Council of the American Scientific Affiliation. He and his wife have two grown sons and are active in their church in Geneva, Illinois. They have also served on the local advisory board for YoungLife.