Complex sentence: In 2005, Berman was elected to the board of Icograda, and servesd as Vice-President and Treasurer and re-elected for additional terms in 2007 and 2009, at which time became Sustainability Chair.
Split into simpler sentences: In 2005, Berman was elected to the board of Icograda, and served as a Vice-President and Treasurer. He was re-elected for additional terms in 2007 and 2009, at which time he became Sustainability Chair.