Mark Peters is responsible for management and integration of a large, multipurpose national laboratory, with a mission focus in nuclear energy, national and homeland security, and energy and environmental science and technology. He manages an organization of 4,200 staff and multiple nuclear and non-nuclear experimental facilities, with an annual budget of more than $1 billion. Peters serves as a senior advisor to the U.S. Department of Energy on nuclear energy technologies and research and development programs, and nuclear waste policy. As a recognized expert in nuclear fuel cycle technologies and nuclear waste management, Peters is called upon frequently to provide expert testimony to Congress in formulation of policies for nuclear fuel cycles, nonproliferation and nuclear waste disposal. Peters serves as chairman of the National Laboratory Directors Council Executive Committee.