Mark Lowham is CEO and managing partner at TTR Sotheby’s International Realty in Washington, D.C., and one of the most charitable men in real estate. His agency participated in almost 100 public service events in 2016, and he serves on a number of public health and education boards. Lowham is a member of the board of directors of Metropolitan Regional Information Systems (MRIS), which recently awarded him for his leadership and humanitarianism throughout real estate.