Our Board Members
Dr. Peter S. Winokur, Chairman
Dr. Peter S. Winokur of Maryland has been appointed a Member of the Defense Nuclear Facilities Safety Board for a term expiring October 18, 2014. Dr. Winokur has more than 40 years of experience as a scientist and engineer in the field of radiation effects science, technology, and hardness assurance in support of military and space systems. A Fellow of the Institute of Electrical and Electronic Engineers and the American Physical Society, he was selected as one of the most highly cited researchers in Engineering by the Institute for Scientific Information, which lists the 250 most highly cited researchers in the world in given scientific fields.
Ms. Jessie Hill Roberson, Vice Chairman
Ms. Jessie Hill Roberson a native of Evergreen, Alabama, has over 30 years of experience in the nuclear engineering field, with profound experience in low level waste management, environmental restoration, reactor operations and project management. Ms. Roberson’s who is currently serving her second tour with the Defense Nuclear Facility Safety Board (DNFSB) was initially nominated as a member of the Board in September 1999 by President Bill Clinton. Ms. Roberson was confirmed by the United States Senate in January 2000. After a short departure from the board, Ms. Roberson was again nominated as Vice Chairman of the Board by President Barack Obama.
Dr. John E. Mansfield, Board Member
Dr. Mansfield is an accomplished theoretical physicist with an exceptionally broad range of experience, both within and outside government, in the management of technology support to national defense programs. From the base of his academic work in elementary particle theory, philosophy, and classical languages, Dr. Mansfield has expanded his interests and contributions to a wide variety of areas of physics, engineering, operations analysis, and political-military studies in support of the national defense and civil space programs.
Mr. Joseph F. Bader, Board Member
Mr. Joseph F. Bader, of the District of Columbia, was appointed a Member of the Defense Nuclear Facilities Safety Board on November 30, 2004 and was re-nominated by the President and confirmed on March 19, 2010. Mr. Bader has held executive and senior management positions primarily in the nuclear weapons complex and nuclear power sectors for Hill International, Inc., Fluor Daniel, Inc., Urenco, Inc., Exxon Nuclear and Westinghouse Electric Corporation.
Mr. Sean Sullivan, Board Member
Mr. Sean Sullivan of Connecticut was appointed a Member of the Defense Nuclear Facilities Safety Board on August 2, 2012, for a term expiring October 18, 2015. Mr. Sullivan is a graduate of the U.S. Naval Academy, and served as a U.S. Navy submarine officer for twenty-six years. During his Navy career Mr. Sullivan was extensively involved in all aspects of operations, maintenance, and oversight of naval nuclear reactors and nuclear weapons. After leaving active duty, Mr. Sullivan practiced law as a civil litigation attorney for five years in the areas of torts, employment law, land use, and municipal law.