Os Hillman formerly owned and operated an ad agency for 12 years, serving clients such as American Express and Steinway & Sons pianos. Today he is founder and president of Marketplace Leaders, an organization whose purpose is to help men and women fulfill their God-ordained calling in and through their work life. He is also president of the International Coalition of Workplace Ministries (ICWM) and Aslan Group Publishing, and directs an online website called faithandworkresources.com. Os is an internationally recognized speaker on the subject of faith and work, speaks to business groups and churches, and writes on various faith and work-related subjects. He is a faculty member of the Wagner Leadership Institute on Workplace Ministry. Os writes a daily Internet devotional entitled TGIF Today God Is First that is read daily by several hundred thousand people worldwide. He has authored ten books, including The Faith and Work Movement: What Every Pastor and Church Leader Should Know, TGIF Today God Is First, The 9 to 5 Window and The Upside of Adversity, and teaches leadership workshops entitled Called to the Workplace. Os attended the University of South Carolina, is married to Angie and has one daughter, Charis. Os and Angie live in Cumming, Georgia, a suburb of Atlanta.