Our Team
Board
Tom Leppert
Tom Leppert is a distinguished leader with a career spanning business, government, and public service. He has served as CEO of The Turner Corporation, Kaplan, Inc., and Castle & Cooke Properties, as well as Vice Chairman of Pacific Century Financial Corp. From 2007 to 2011, he was Mayor of Dallas, leading initiatives in public safety, economic growth, and education.
A former White House Fellow, Leppert holds an MBA from Harvard and a degree from Claremont McKenna College. He has served on numerous corporate and nonprofit boards, including Fluor Corp., Austin Industries, and Dallas Theological Seminary. He co-leads the Brain Health Project and advises organizations in business and education. Recognized for his leadership, he has received multiple honors, including “CEO of the Year,” “Texas Businessman of the Year,” and induction into the Dallas Business Hall of Fame.
Andy Wileman
Andy Wileman has held leadership positions in the church, academia, and in business since graduating with a business degree from the University of Texas in 1976. Most recently, he served as the Senior Pastor of Grace Bible Church in Dallas for nineteen years, after nine years as the Associate Pastor. Prior to that, he worked in several businesses, focusing on real estate and the staffing industry. He also holds a degree from Dallas Theological Seminary (1982), where he served in the administration, worked in fund raising, and taught a course on leadership. He and his wife also owned and operated a small business in East Texas. Presently, Andy is active as a board member and volunteer in several nonprofits, including serving as President of the Cornerstone Center for Economic Development and Kingdom Servants, Inc. Andy and Julie have two married daughters and five grandchildren.
David Kohl
David J. Kohl is a seasoned executive, board member, and strategic advisor with 40+ years in insurance and extensive investment expertise. As a partner at Mangrove Investments, he specializes in turnaround opportunities for lower-middle-market companies. He has served on multiple private company boards, including startups, multi-generational businesses, and nonprofits.
As Immediate Past President of the Dallas Committee on Foreign Relations, David connects U.S. and international business leaders, particularly in family offices and investment communities. He also advises businesses on strategic growth and governance.
David sits on the Advisory Board for The Institute for Excellence in Corporate Governance at UT Dallas and engages in high-impact nonprofit initiatives. He holds a B.S. from Louisiana Tech University.
president
Andra Johnson
Andra Johnson is a pillar in the South Dallas community. Moving to Texas at the tender age of six, Andra’s early years were marked by hard work and determination. Growing up with limited resources, he was driven to rise above his circumstances, starting with newspaper routes and working hand in hand with his grandfather on various construction projects, learning the field at a very young age.
Andra’s commitment to service began early, leading him to join the Army Reserves and later transferring to the National Guard. His heart for service extended beyond the military, as he has been a dedicated pastor to his home church for over a decade. Andra’s journey continued with a pursuit of education, completing business administration courses at a trade school and graduating to secure a position with ATI Career Training Center.
Vice President
Darnell Caldwell
Darnell Caldwell is an Education Consultant, Adjunct Instructor, and Author of Gonna Be Successful: The Interactive Guide to Taking Ownership of Your Success.
Driven by a passion for serving people, Darnell draws on nearly 20 years of experience in education, mentoring, nonprofit work, and ministry to empower individuals from all backgrounds.
A proud first-generation graduate of Texas Southern University and entrepreneur, he helps individuals shatter self-doubt and self-limiting beliefs and take ownership of their success. He lives in Dallas, TX, with his wife and three children.
Secretary
Ammar Hussain
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Ammar Hussain focuses primarily on a broad business transactional practice with an emphasis in the corporate, real estate, and banking industries. Ammar represents individual and corporate clients in various transactional matters including real estate acquisitions, mergers and acquisitions (both buy & sell side), securities offerings, asset-based financing, joint ventures, corporate formation and organization, commercial leases, and nonprofits.
As a Texas native, Ammar completed his undergraduate studies at The University of Texas at Dallas in 2017 and graduated with honors from Southern Methodist University Dedman School of Law in 2020. During law school, Ammar was a member and later selected to serve as chief, of the Small Business and Trademark Clinic, where he assisted clients in creating various business entities and protecting clients’ intellectual property by registering trademarks with the USPTO.
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