He is a legislative specialist who has authored and co-authored five laws in the State of Oregon such as 2016’s landmark anti-poaching legislation, which included specific provisions concerning the taking of bear gallbladders, bear paws, cougar bones, cougar sex organs and other wildlife parts destined for the Asian black markets. In 2011 David was part of the legislative team that banned the possession, sale and trade of shark fins within Oregon. He has served on the board of directors of the Rhino Trust, the Kaya Foundation and the Emerald Blue Project, and he worked closely with the late Anna Merz with regard to moral and political issues surrounding rhino preservation in Africa.