Board of Trustees

Aaron Renenger, Chair

TCS Alumni Parent

Aaron lives with his wife, Christina, and their three children in McLean, Virginia. They have been long-time members of the Trinity community, having enrolled their oldest, now a junior in college, at Trinity as a kindergartner. They attend Alexandria Presbyterian Church, where Aaron is an elder overseeing the adult education ministry.  Aaron is an attorney and seminarian in his spare time.  

Kristen Short, Vice-Chair

Managing Partner
Advance Strategies

Kristen and her husband, Marc, live in Arlington, Virginia. They are active members of The Falls Church Anglican, where Kristen recently served as the vestry’s senior warden. They are learning how to “empty nest” since the youngest of their three children graduated from TCS in 2026. As an experienced development consultant, Kristen enjoys helping leaders and non-profit organizations achieve mission-driven success.

Jamie Adams, Treasurer

Managing Director
The Carlyle Group

Jamie is a Managing Director focused on US Real Estate at The Carlyle Group. He and his wife, Erin, attend McLean Presbyterian Church and live in Vienna, Virginia. They have two daughters, Emily and Avery, who are at Trinity in Grades 8 and 9.

Casey Mattox, Secretary

Vice President for Legal Strategy at Stand Together
Senior Advisor at Americans for Prosperity

Casey Mattox is Vice President for Legal Strategy at Stand Together and Senior Advisor at Americans for Prosperity. In these roles he advocates for and creates strategies and partnerships to ensure a constitutionally limited government that protects the civil liberties of all Americans. Casey's prior legal career at Alliance Defending Freedom and the Christian Legal Society focused on defending the First Amendment rights of students, faculty, healthcare workers and religious organizations. Casey has a J.D. from Boston College School of Law and an undergraduate degree from the University of Virginia. 

Hiba Aziz Attwa 

Trinity Parent

Hiba and her husband, Moner, have three children and have been part of the Trinity community since 2016. Over the years, she has loved getting involved as a parent volunteer, grade-level representative, and member of the PTO Board.

Hiba is a Virginia-licensed Professional Engineer and the founder of A3J Consulting. Before starting A3J, she spent many years with Fairfax County Land Development Services, where she held several leadership roles in land development and concluded her service as Acting Building Official.

She and her family worship at St. Mark Coptic Orthodox Church, where they are active members.

Wallace L. Butler

Commercial and Government Transaction Attorney. 

Wallace and his wife attend Agape Embassy Ministries and live in Centreville, VA.  They have three children - two are current students at Trinity in Grades 7 and 9.

Michael Hardesty

Corporate Vice President and Controller
Northrop Grumman Corporation

Mr. Hardesty is Corporate Vice President and Controller of Northrop Grumman Corporation. He attends McLean Bible Church and has three children – all graduates of Trinity.

Nicole Hoplin

President
Hoplin Jackson Charitable Advisors

Nicole and her husband, Eric, have three sons at TCS.  She is the co-founder and president of Hoplin Jackson Charitable Advisors.  An expert in philanthropy, Nicole helps clients nationwide create more impact with their charitable giving and, in so doing, makes giving away wealth as joyful and fulfilling as creating it. She is the author of Funding Fathers: The Unsung Heroes of the Conservative Movement and Ten Secrets of Successful Giving.  The Hoplins are active members of Good Shepherd Lutheran Church in Herndon. 

Kyu Jung

President
Procon Consulting LLC

Kyu Jung and his wife, Jennifer, and their three children live in Vienna, Virginia. They have two graduates and one child currently enrolled at Trinity. They attend Cornerstone Chapel. Kyu is the President of Procon Consulting LLC.

Partner
Holland & Knight

Matt Leopold is a partner with a law firm in Washington, DC, and he focuses on environmental regulatory issues.  He has held several government roles, including serving as General Counsel of the U.S. Environmental Protection Agency.

Matt and his wife, Kim, hail from Florida but have settled in Northern Virginia and attend Burke Community Church. They have three children who attend TCS, ranging from sixth grade to tenth grade. Before pursuing a career in law, he served as a teacher at Nicaragua Christian Academy in Managua, Nicaragua. He and his family enjoy outdoor activities, including camping, fishing, trekking, and hunting.

Santiago Sedaca

CEO
LifeNet International

Santiago has worked at the intersection of business and international development for 25 years, managing strategy and development programs in more than 40 countries. He now serves as CEO at LifeNet International. He studied at Gordon College and later received his Masters degree at Georgetown University, where he met his wife, Nicole. They have three children, two recent TCS graduates and one attending Trinity. They worship at Restoration Anglican Church, where Santiago has served as Warden. He sits on the Boards of Gordon College and ENLACE, a Christian relief and development agency based in Central America. 

Matt Thomas, Ed.D 

Head of School, CEO
Trinity Christian School

Matt has served in education for over 25 years in Christian schools, Christian higher education, seminaries, the Christian non-profit sector, and pastoral ministry. He has devoted his career to serving and strengthening Christian educational institutions for the flourishing of students, faculty, and staff.  

Matt and his wife Beth have two daughters who attend Trinity and one Trinity alumnus.

Johnny Yun

Managing Director
Yun Wealth Management at RBC

Johnny and his wife, Lina, have three children, a recent 2026 Trinity graduate, and two currently in the upper school. The Yun family resides in Vienna and attends church at Cornerstone Chapel in Leesburg.  Johnny is a proud member of C12, an avid Trinity Volleyball fan, and loves to fish and golf.