David grew up in Pakistan, the son of missionary parents Jack and Edna Christensen. He spent his childhood years in a boarding school in the foothills of the Himalayas. The family returned to the United States when he was a teenager, and his dad took a pastorate in Maine. After seminary, David returned to Maine and has served in dual ministry as a college professor and pastor for over thirty years. He is the Senior Pastor of Galilee Baptist Church in Gorham, Maine and the President and Founder of The Rephidim Project, a ministry devoted to providing resources for Bible exposition. David and his wife, Janie, live in Maine and have two adult daughters. They enjoy camping and kayaking in the summer and skiing and snowshoeing in the winter.