Jeff Johnson is President and Principal Consultant at UI Wizards, Inc., a product usability consulting firm that offers UI design, usability reviews, usability testing, and training. He has worked in the field of Human-Computer Interaction since 1978.

After earning B.A. and Ph.D. degrees from Yale and Stanford Universities, he worked as a user-interface designer and implementer, engineer manager, usability tester, and researcher at Cromemco, Xerox, US West, Hewlett-Packard Labs, and Sun Microsystems. He has published numerous articles and book chapters on a variety of topics in Human-Computer Interaction and the impact of technology on society. He frequently gives talks and tutorials at conferences and companies on usability and user-interface design.

He assisted in the design and evaluation of the Election Incident Reporting System, a web-based system for reporting and voting problems, which was used to monitor the 2004 and 2005 U.S. elections. In addition to authoring GUI Bloopers and GUI Bloopers 2.0, he wrote Web Bloopers: 60 Common Design Mistakes and How to Avoid Them (2003).