Os Hillman has written nearly a dozen books and is considered the grandfather or founder of the Marketplace Ministries movement in the USA beginning in 1997. His daily devotional "Today God is First" (TGIF) is read by 200,000 of people with his writings and studies of how the word of God applies in the marketplace in both business and ministry, areas seldom discussed in churches or by pastors.
Os had a very successful advertising agency for many years in Atlanta until he faced many "big crisis" he could not overcome in his own strength, which became a tool for the Lord to get Os' full attention.
In this video by Os Hillman, he shares his calling of coming to the Marketplace Ministry that he formed. He uses the story of Joseph and the trials he faced in being rejected by his family, imprisoned in Egypt, and through obedience and trusting the Lord, he emerged as the leader of Egypt under Pharaoh. Os shows the parallels in his life, your life, and business that explain how the Lord is working in our lives whether we recognize it or not.