Dan has practiced information architecture and user experience design since 1994. Through his consulting work in both the public and private sectors, Dan has improved enterprise communications for both Federal and Fortune 500 clients, including The Federal Communications Commission, The Postal Service, US Airways, Fannie Mae, First USA, British Telecom, Special Olympics, AOL, and the World Bank. Dan has taught classes at Duke, Georgetown, and American Universities. He is a popular speaker and writer on topics relating to information architecture. Most recently, Dan taught a pre-conference tutorial at the 2005 IA Summit on using Microsoft Visio. He is very active in the local Washington, DC, information architecture community and organizes regular workshops there. In 2002, Dan collaborated with information architects around the world to establish the Information Architecture Institute, the first professional organization dedicated to the craft.