He is currently co-chairman of the National Academy of Design and is on the board of the Architectural League of New York. He was appointed to the Hudson Planning Board by Mayor Tiffany Martin in the fall of 2017 and became its chair in January 2018. As chair of the Planning Board, Chatham is ex officio on the board of HCDPA (Hudson Community Development and Planning Agency), which he chairs, and on the Hudson IDA (Industrial Development Agency).