He is the Cyberterrorism Advisor for the International Association for Counterterrorism & Security Professionals and a columnist for The Journal of Counterterrorism and Homeland Security. He is a member of the FBI's InfraGard program, the security partnership between the FBI and industry. David is also a member of the U.S. Naval Institute and the National Defense Industrial Association, the leading defense industry association promoting national security.

David regularly writes commentary and analysis for CNN's Anderson Cooper 360 and has been a guest commentator for the Nieman Watchdog of the Nieman Foundation for Journalism at Harvard University. He is the author of four traditional books and nine digital books, and has written more than 700 articles about technology, competitiveness, and national security policy.

David is an advisory board member for the Technical Communications and Management Certificate program at the University of California, Berkeley extension. He is also a member of the instructional faculty at the University of California, Berkeley extension. David is also a former professor of computer science, has lectured at Princeton, Berkeley, UCLA, and Stanford, has been awarded the prestigious Sigma Xi Research Award in Engineering, and was a candidate for the 2008 Pulitzer Prize in Letters.

David is best known for his non-partisan national security analysis of the Bush White House email controversy. He is the author of the book Where Have All The Emails Gone? How Something as Seemingly Benign as White House Email Can Have Freaky National Security Consequences, which explores the controversy from a technical perspective and, according to The Intelligence Daily, is "the definitive account about the circumstances that led to the loss of administration emails."

He is also the author ofHow To Save Jobs: Reinventing Business, Reinvigorating Work, and Reawakening the American Dream and The Flexible Enterprise: How to Reinvent Your Company, Unlock Your Strengths, and Prosper in a Changing World.

Earlier in his career, he was an executive at Symantec Corporation. He also held the unusual title of "Godfather" at Apple Inc. and served on the board of the Software Entrepreneurs Forum (now SDForum) in Santa Clara County, California.

David is the creator of ZENPRESS, a breakthrough technology for Internet magazine production. He is also the lead developer of the MySQL and SQLite database extensions for the open-source Frontier Kernel project and has designed embedded database technology used by more than 2,000 companies, universities, and government agencies.

An accomplished author and photographer, David is also an entertaining and electrifying speaker. His commentaries on technology, industry, and emerging nations have been broadcast into more than 40 countries (all in their own unique translations) by Radio Free Europe and Radio Liberty.

Whether offering insight into technology trends, helping small and large businesses remain competitive in a wildly changing world, providing a broader perspective on policy matters, or helping leaders understand the big technology and security challenges facing citizens throughout the world, David makes complex topics understandable, difficult issues compelling, and challenging concerns actionable and solvable.

Weaving a tapestry of industry, politics, security, and technology, he brings a unique and powerful perspective to all his audiences. Known for their clarity and insight, his articles and radio interviews reach more than a million people worldwide each week.