A practicing usability engineer since 1995, Bill is currently working with the National Board of Medical Examiners, where he wears multiple hats as usability engineer, interaction designer, and visual designer. He has also worked with a number of Fortune 500 companies in the financial, pharmaceutical, energy, and manufacturing industries, for clients such as Microsoft, Lincoln Financial, BP, Comcast, Wyeth, Astra Zeneca, and power supplier for the UK, National Grid. Working with clients in the energy sector, Bill evaluated and designed user interfaces for electricity and natural-gas control rooms. He spent 10 years working on complex command-and-control systems for the U.S. Air Force and Navy—including AWACS, NORAD, and AEGIS radar systems.