Dr. Michael Bar­rett served for ten years as Vice President for Academic Affairs/Academic Dean and Professor of Old Testament at Puritan Reformed Theological Seminary. He currently serves as Senior Research Professor/Biblical Studies. He is a min­is­ter in the Heritage Reformed Congregations. He earned his doc­tor­ate in Old Tes­ta­ment Text with a spe­cial focus on Semitic lan­guages. His dis­ser­ta­tion was titled “A Method­ol­ogy for Inves­ti­gat­ing the Trans­la­tion Philoso­phies and Tech­niques of the Sep­tu­agint.” For almost thirty years, he was pro­fes­sor of Ancient Lan­guages and Old Tes­ta­ment The­ol­ogy and Inter­pre­ta­tion at Bob Jones Uni­ver­sity. He is a mem­ber of the Evan­gel­i­cal The­o­log­i­cal Soci­ety and has pub­lished numer­ous arti­cles in both pro­fes­sional and pop­u­lar jour­nals. He contributed to and served as Old Testament editor for The Reformation Heritage KJV Study Bible. He has written several books, including Beginning at Moses, Complete in Him, The Beauty of Holiness, The Next to Last Word, The Gospel of Exodus, God’s Unfailing Purpose: The Message of Daniel; Love Divine and Unfailing: The Gospel of Hosea; A Radical and Comprehensive Call to Holiness (with Joel Beeke), and Wisdom for Life. Dr. Bar­rett and his wife San­dra have two sons, five grand­chil­dren, and one great grandchild. Dr. Barrett’s hob­bies include hunt­ing and think­ing about hunting.

Rev. Jason Helopoulos serves as the Senior Pastor of University Reformed Church (PCA) in East Lansing, MI. He regularly contributes to Tabletalk, the Gospel Reformation Network, the Alliance of Confessing Evangelicals, and The Gospel Coalition. Jason has also authored multiple books including Covenantal Baptism, The Promise: The Amazing Story of Our Long-Awaited Savior, A Neglected Grace: Family Worship in the Christian Home, The New Pastor’s Handbook: Help and Encouragement for the First Years of Ministry, Let the Children Worship, and These Truths Alone: Why the Reformation Solas Are Essential For Our Faith Today. He serves on the boards of Twin Lakes Fellowship, the Gospel Reformation Network, and the Malawi Reformation Network. Jason and his wife, Leah, have two children—Gracen and Ethan. He is an avid fan of the World Champion Chicago Cubs and the less than champion, Chicago Bears.

Dr. Timothy Gwin serves as associate pastor at Carriage Lane Presbyterian Church (PCA) in Peachtree City, Georgia. He holds an M.T.S., M.Div., and M.Th. from Reformed Theological Seminary. His emphasis has been in Reformation Theology with a concentrated study of John Calvin’s Theology of the Christian Life. Tim completed his D.Min. on Calvin and the Psalms as the handbook for the Christian Life through Erskine Theological Seminary’s Institute For Reformed Worship. He currently teaches as an adjunct professor at Metro Atlanta Seminary and has taught individual classes at RTS. Tim and his wife, Rosie, have two children.

Dr. Brian Cosby serves as senior pastor of Wayside Presbyterian Church (PCA) on Signal Mountain, Tennessee, where he has served for over 10 years. He is an adjunct professor of historical theology at Reformed Theological Seminary, Atlanta, and content writer for Ligonier Ministries. He holds degrees from Samford University (B.A.), Beeson Divinity School (M.Div.), and the Australian College of Theology (Ph.D.). Brian is an officer (Capt.) in the United States Air Force Reserves, serves on the board of trustees for Covenant Theological Seminary, is an advisory board member of Beeson Divinity School, and is the author of over a dozen books, including Uncensored: Daring to Embrace the Entire Bible, Giving Up Gimmicks: Reclaiming Youth Ministry from an Entertainment Culture, A Christian's Pocket Guide to Suffering, and None Else (co-authored with Joel Beeke). Brian enjoys reading, backpacking, and fishing. He and his wife, Ashley, have three children and live on a small farm.