Nathan Busenitz began teaching at The Master’s University in 2000 as an adjunct faculty member in the communication department. From 2003–2009, Nathan served as a full-time member of the pastoral staff at Grace Community Church. In 2008, he began teaching historical theology at The Master’s Seminary, and became a full-time faculty member in 2009. He currently co-pastors the Cornerstone fellowship group at Grace Church. Nathan and his wife, Beth, have four children.

Prior to being appointed to his full-time role with TMAI, Dr. Tatlock served as Executive Vice President and Provost of The Master’s University. Mark brings 17 years of executive administrative experience to TMAI, and has been active in theological training for cross-cultural ministry within urban and international contexts. He is eager to invest in strengthening TMAI’s development and academic divisions. As a graduate of The Master’s Seminary, he is committed to TMAI’s theological distinctives and the priority of pastoral training. Mark and his wife Lisa have five children: Jacob, Josiah, Hope, Paul, and Olivia. Care for orphans and foster children is an area of personal concern for them both, believing that God would have His people model the amazing picture of the Gospel and of His love that is found in adoption.

Mark grew up in Russia until 1990, when his family immigrated to Los Angeles and joined Grace Community Church. Having grown up at Grace, it was natural for him to prepare for ministry at The Master's Seminary, where he earned his M.Div. and Th.M. degrees. In 2017, Mark earned his Ph.D. from the University of Edinburgh. Mark joined the church staff in 2007 and currently serves in church administration and leads the young professionals ministry, Foundation.