Dan taught in the biblical counseling department of Grace Theological Seminary for seven years (1983–1989). From 1989–1997 he worked as a professor in the Master of Arts in biblical counseling program at Colorado Christian University, Denver, Colorado. Currently, Dan serves as president and professor of counseling at Mars Hill Graduate School in Bothell, Washington.
He travels and speaks extensively to present his unique perspective on sexual abuse recovery, love and forgiveness, worship, and other related topics. He is the author of The Wounded Heart (NavPress), The Healing Path, and How Children Raise Parents (Waterbrook Press) and has coauthored four books with Dr. Tremper Longman, III—Intimate Allies (Tyndale House Publishers), The Cry of the Soul (NavPress), Bold Love (NavPress), and Bold Purpose, (Tyndale House Publishers). He and his wife, Rebecca, live in the Puget Sound area with their three children, Annie, Amanda, and Andrew.