Mark Lowham is an important figure in business who has won many awards and medals. He hit even higher levels in his more than 30-year career when he became CEO and managing partner of TTR Sotheby's International Realty. Mark has set three of the top four sales prices in the history of the DC area. The $45 million Kimsey Estate sale in 2020 is one of them. He is also one of the 200 most important people in private real estate, according to The Swanepoel Power 200. Mark is also the head of the board for Teach for America.