David is Managing Partner of TD Investment Company, which has made investments in more than sixty private companies. David is President of American Security Products, a leading manufacturer of high-security safes. He has served as Controller, Vice President of Sales and Co-President of Nelson Nameplate Company, a manufacturer of durable graphics and membrane switches based in Los Angeles, California. Prior to joining Nelson, David worked as an engineer with IBM Corporation from 1982 to 1984. He is currently on the board of Nelson-Miller, American Security Products, Columbia Sanitary Products, CALO and Gogotech. David received his Bachelor’s Degree in Industrial Engineering from Northwestern University.