Mark Gaffigan is the Managing Director of GAO's Natural Resources and Environment team. The team is responsible for GAO's assessments of federal efforts to manage our nation's land and water resources, protect the environment, ensure food safety, manage agricultural programs, ensure a reliable and environmentally sound energy supply and address U.S. and international nuclear security and cleanup.

Mark joined GAO in 1987. He holds a master's degree in Public Administration and a bachelor's degree in Economics from the University of Illinois. In 1999, Mark passed the Certified Public Accountant exam in the State of Maryland.