• Gathering detailed end-user product requirements,
• Transforming requirements into designs, with primary focus on feature set details and user interface, and
• Evaluating product usability and impact on the workplace.

David left Tektronix, Inc., in 1997 after 21 years for the opportunity to work on projects beyond the narrow scope of high tech test and measurement instruments. At Tek, he last worked in the Customer-Centered Design group within Tek's Measurement Business Division (precision instrumentation) Central Engineering organization. As the group's co-founder and its first manager, David developed and refined many of the end-user interview methods the group uses to elicit deep work background, detailed product requirements, design and usability issues, and product impact on the workplace. While a principal engineer in the Tektronix Laboratories, TekLabs, he secured five patents for visual instrumentation programming techniques.

Since striking out on his own, David has worked on diverse projects including commercial irrigation control software design, Internet Ecommerce site evaluation, and printer user interface simulation and testing.

David has been a member of ACM and its special interest group on computer-human interaction (SIGCHI) since 1986. He was audio-visual chair for the SIG's major conference, CHI'90, and co-chair for CHI'91 and INTERCHI'93 in Amsterdam, The Netherlands. He is currently Chair of CHIFOO, the Computer-Human Interaction Forum Of Oregon. David is also a member of the Usability Professionals Society (UPA). David holds a BS in History from Portland State University (1974).