Blackman was head men's tennis coach at
American University from 1998 to 2004, when he became Director of the Junior Tennis Champions Center at College Park, Maryland He was Senior Director of Talent Identification and Development for the
United States Tennis Association (USTA) from 2009 to 2011, serving on the Board of Directors from 2003 to 2004 and 2005–06. He founded the Blackman Tennis Academy in
Boca Raton, Florida in 2011. In 2015, Blackman re-joined the USTA, succeeding
Patrick McEnroe as General Manager of Player Development. ==Personal life==