Stuart Walker has been employed by U.S. EPA in Washington, DC since 1990 in either the Superfund program (the Office of Superfund Remediation and Technology Innovation) or the Office of Radiation and Indoor Air working on issues regarding the cleanup of contaminated sites. His primary areas of responsibility include serving as the Superfund program's national lead on issues regarding radioactively contaminated CERCLA sites. In this latter role, Stuart develops national policy for characterization, cleanup and management of radioactive contamination at CERCLA sites. Previously Stuart was the lead staff person on remedy selection issues for EPA's CERCLA reauthorization team. Stuart is a member of the ITRC Radionuclides team and is an instructor on several of the team's Internet-based training courses. Stuart earned a bachelor's degree in political science and economics from the American University in Washington, DC in 1985 and a master's degree in policy analysis and development from George Washington University in Washington, DC in 1987.