David began his professional career with The Vantage Companies in Dallas, Texas in 1979. He returned to Kansas City in 1983 and affiliated with Zimmer Real Estate Services. His primary duties include industrial and commercial real estate brokerage of properties owned and managed by Zimmer, as well as third party clients.

David became an active member of the Society of Industrial and Office Realtors in 1990. He served as International President of SIOR in 2011-2012. He was President of the Western Missouri-Kansas Chapter of SIOR in 1998. He served as Regional Vice President of Region V of SIOR as well as on its National Board of Directors from 1999-2001. David was honored as ONCOR International’s CEO of the Year, an award voted on by the CEOs, managers and staff of fellow ONCOR International affiliates. In 2009, David became a Fellow of RICS (FRICS). RICS is the Royal Institution Of Chartered Surveyors, one of the oldest and most prestigious real property organizations in the world, headquartered in London, England.