He co-chairs the Cedar River Council, which brings together citizen and government representatives who have an interest in the health of the river and its upper watershed, which supplies drinking water to Seattle. Larry co-chairs the WRIA-8 Steering Committee and is a member of the WRIA-8 Forum, where citizens, scientists, businesses, environmentalists and governments are cooperating on salmon protection, conservation and restoration projects and plans. Larry also serves on the 4Culture Board, King County's arts and heritage agency.

Larry also serves on several outside committees, including the Sound Transit Board of Directors. He co-chairs the Cedar River Council, which brings together citizen and government representatives who have an interest in the health of the river and its upper watershed, which supplies drinking water to Seattle. Larry co-chairs the WRIA-8 Steering Committee and is a member of the WRIA-8 Forum, where citizens, scientists, businesses, environmentalists and governments are cooperating on salmon protection, conservation and restoration projects and plans. Larry also serves on the 4Culture Board, King County's arts and heritage agency.