His clients include all types of charitable, religious, and educational organizations. David graduated with honors with a Bachelor of Science degree in business management in 1985 and earned his juris doctor degree in 1989 from Southern Methodist University. He is a registered Congressional lobbyist where he works on behalf of religious nonprofit organizations for the protection of religious liberties. He co-authored Nonprofit Law for Religious Organizations: Essential Questions and Answers, which is a response to the need for guidance, direction, and clarification of legal and tax laws affecting churches and other religious organizations.