Yarrington has written many articles for major journals relating to church music and especially the changing voice. His published compositions are with Augsburg-Fortress, Choristers Guild, and MorningStar. Books include Training the Youth Choir, Somebody's Got My Robe, and Somebody's Got My Hymnal. A new book, in progress, is entitled: Have We Had This Conversation?

Dr. Yarrington is the faculty representative to the athletic council and an avid basketball fan. He serves on the Admissions Committee as well.

In addition to his work at HBU, Yarrington directs the Chancel Choir of the First Presbyterian Choir. Previous positions in church music have included McFarlin memorial Methodist in Norman, Oklahoma; The First United Methodist Church of Dallas, Texas and Pulaski Heights United Methodist Church of Little Rock, Arkansas.