Meet the Senior Team

George Sanker, Headmaster

LAH_6571George Sanker has served as Headmaster of The Covenant School since 2011. Working in education since 1996, George has served as principal of two charter schools in Washington, D.C. and Longmont, Colorado. He began his career in education in private Christian schools where he taught history and theology to middle and high school students. George graduated from Colgate University with a B.A. in Political Science. After college, he served his country as an officer in the Central Intelligence Agency where he specialized in data pertaining to Southeast Asia. He also received an M.A. in Religion from Reformed Theological Seminary. George is currently ABD in sociology at the University of Virginia. He and his wife, Jeannette, have six children.


Mack Barr, Director of Institutional Advancement

As Director of Institutional Advancement, Mack Barr oversees Covenant’s fundraising, communications, and marketing operations. He raises major and planned gifts for such initiatives as scholarships, restricted giving solutions, and the capital campaign. Joining the staff in 2016, he brings twelve years of experience in advancement and financial planning. Most recently, he was Associate Director of Gift Planning at the University of Virginia, after having served as Associate Director of Development at the U.Va. Health Foundation. He is from Boone, NC, and first moved to Charlottesville two decades ago to work and study with Ken Myers at Mars Hill Audio. Mack holds a B.A. in Religion from Wake Forest University and an M.Div. from Reformed Theological Seminary. He and his wife, Katie, have five children.

Frank Berry, Chief Financial Officer/Chief Operating Officer

LAH_0866_cropFrank Berry joined The Covenant School as Chief Financial Officer in 2012. Previously, Frank worked in the private sector for over 25 years including14 years at NTELOS in various executive roles; his last assignment was as COO of the $200 million Wireline telecommunications business. Frank graduated from the University of Virginia with a B.S. in Systems Engineering and earned an MBA from the Kenan-Flagler Business School at the University of North Carolina. Frank is a Virginia native, growing up in Virginia Beach. He and his wife, Nancy, have three children.


Andrea Blount, Assistant Head of Lower School

lah_0382Andrea Blount joins our Lower School administration team as The Assistant Head of Lower and Language Arts Coordinator.She will assist in administrative responsibilities, teach, and support teachers in all areas of reading and writing. Andrea grew up in Charlottesville and attended the University of Virginia where she earned an M.Ed. in Elementary Education and an Ed.S. in Reading. Over the course of her career, she has taught at the elementary, middle school and collegiate levels. Andrea has also led school divisions in professional development and has presented at state and national conferences. She and her husband, David, have a son.


Spencer Burton, Middle School Director

DSC_7850a webSpencer Burton has served at The Covenant School since 2000. After graduating from James Madison University with an M.Ed. in 1996, Spencer taught in public school systems in Georgia and Virginia. Since coming to The Covenant School, Spencer has served as Head of Middle School, Interim Headmaster, Assistant Headmaster, and Head of Upper School, and Director of Student Life before moving into his current position as Middle School Director. Spencer and his wife, Debbie, have two children.




Mo Gaffney, Head of Lower School

moMo Gaffney serves as Head of Lower School, joining the team in 2011. Before coming to The Covenant School, Mo taught primary grades in both public and private schools. She earned a B.A. in Early Childhood Education, an M.Ed. in Curriculum and Instruction, and a doctorate in Elementary Education, all from the University of Virginia. While at U.Va., she did extensive research in elementary classrooms and served as a literacy coach. She has led professional development workshops in reading and writing and has presented at national conferences. Affiliated with the National Writing Project, she continues to be a leader in the Central Virginia Writing Project. Mo and her husband, Jeff, have four children.


Chris Hall, Lower School Academic Dean

DSC_7840a webChris Hall grew up in Towson, Maryland and earned a B.A. in Philosophy from Gettysburg College and an MAT in Elementary Education from Towson University. Before coming to The Covenant School as Lower School Academic Dean in 2012, Chris taught at public and independent schools from kindergarten to college-level courses. For five of those years, he served as Science Department Chair in a rigorous college-preparatory environment. Chris has given professional development seminars in several disciplines including science, technology, martial arts, and guitar. He has written a Lower School science curriculum, Skills of the Tracker, and is currently co-authoring a book. Chris and his wife, Cathy, have built a sustainable micro-farm which provides much of their food and heat. Chris and Cathy have three children.

Donna Harris, Director of Admissions and Financial Aid

DSC_0126a web (1)Donna Harris began working at The Covenant School as Assistant to Headmaster Stephen Yowell shortly after the school was founded in 1985. She has served in her current position as Director of Admissions and Financial Aid for the last 20 years, but has been admitting children to the school for nearly three decades. Before coming to Covenant, Donna worked at Highland School in Warrenton, Virginia. A native of northern Virginia, she attended Virginia Commonwealth University. An oil painter and avid reader, Donna and her husband, Bob, have two children and two grandchildren.



Leslie Moeller, Head of Upper School


Leslie Moeller began her role as Head of Upper School in 2016, bringing with her over 20 years of wide ranging leadership experience in education. She is the former Chairman and current Vice Chairman of the Society for Classical Learning and was also the founding editor of SCL Journal. At the Geneva School of Boerne, Texas, Leslie helped lead the school through dramatic growth over 13 years in multiple roles, including Chairman of the Board; Head of School; Capital Campaign Co-Chairman; founder and coach of Geneva’s nationally ranked debate program; and instructor of Senior Thesis, middle school language arts, informal logic, and debate. She holds a J.D. from Boston College Law School and a B.A. from U.Va. in English Literature and Economics. Leslie and her husband, Eric, have three children.

Daisy Rojas, Associate Director of Advancement

LAH_0416Daisy Rojas supervises annual giving, special events, and marketing for the school. She is a native of the Charlottesville area and a graduate of the University of Virginia, with a B.A. in Anthropology and Latin American Studies, and an M.Ed. with a concentration in Higher Education Administration. In addition to developing three family businesses, Daisy also worked with government, corporate, and private stakeholders to develop The Cultural Exchange Institute (CEI), a study-abroad program located in Costa Rica. At the University of Virginia, she served as Stewardship Officer for the highest level giving circle, The Lawn Society. Daisy regularly contributes to several academic publications, and her work has been published both in the U.S. and abroad. She and her husband, Geiner, have four children.

Bryan Verbrugge, Upper School Chaplain

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The son of a Navy man, Bryan Verbrugge grew up around the world. He attended Geneva College in western Pennsylvania, studying youth ministry and education; he also played college soccer. Coming to The Covenant School in 1996, Bryan took three years off to study theology where he earned an M.Div. from Westminster Theological Seminary before returning to Covenant. Now, he serves the school as Upper School Chaplain, Bible Department Chairman, and senior Bible teacher. A competitive triathlete, he also coaches the Varsity Boys Soccer team. Bryan and his wife, KC, have four children.



Clark Walker, Athletic Director


Clark Walker joined The Covenant School as Athletic Director in 2016. A graduate of the University of Virginia with a B.S. in Commerce from the McIntire School of Commerce and an M.Ed. in Sports Business and Management with a concentration in coaching from VCU, he is also the Head Varsity Boys Basketball Coach at Covenant. Before coming to Covenant, Walker worked as a senior project and marketing manager for a national medical technology services company. Prior to that, he served as a financial representative for four years at Northwestern Mutual where he was an agent for financial counsel and administration. Walker is a native of Atlanta, GA, and attended Wesleyan School where he was inducted into the Athletic Circle of Honor. He and his wife, Jennifer, have two children.

Bill Zimmerman, Upper School Academic Dean

billBill Zimmerman came to The Covenant School in 2012 with 30 years experience in private school education. Over the course of his career he has taught, coached, and held administrative positions at academically rigorous private schools across the country. From 2003 – 2012, he served as Senior Master and Vice President of Educational Services at Washington Christian Academy, overseeing the academic program and the professional development of faculty. During his career, Bill has moderated and presented at educational conferences, and has been the recipient of two National Endowment for the Humanities grants. Bill received his B.A. and M.A. degrees in History from Rutgers University. He and his wife, Karen, have three children.