Trass, Colin Geoffrey, formerly of Acton and Concord, Oct. 10, 2009. Former husband of Elisa Spence. Father of Nicholas Trass of Australia and brother of Graeme, Ronald, and Shirley Trass of New Zealand. Colin was a kind and gentle man and had an accomplished career with IBM, Arthur D. Little, Sikorsky Aircraft, and Black & Decker Europe. He loved animals and nature. Donations in his memory may be made to MSPCA, 350 Huntington Ave. Boston, MA 02130.