Tommy has led worship at Christian Assembly in Los Angeles, California with his pastor, Mark Pickerill, since 1990. He has traveled with Promise Keepers, Greg Laurie Harvest Crusades and Franklin Graham. He has also been privileged to serve with such church leaders as Jack Hayford, Bill Hybels and Rick Warren. He has recorded worship projects for Maranatha! Music, Integrity Music, and Get Down Ministries. He has written over 100 songs that are currently being tracked by C.C.L.I. and are being sung in churches around the world, including He Knows My Name, Only A God Like You, That's Why We Praise Him, Lord I Believe In You, Mourning Into Dancing and his most recent, Break Through.