Mark Duff

Mark Duff

President and Chief Executive Officer

Mr. Mark Duff was appointed to the position President and Chief Executive Officer (CEO) by the Company’s Board of Directors on September 8, 2017.  Prior to holding the position of CEO, Mr. Duff held the position of Executive Vice President/Chief Operating Officer. Mr. Duff has 30 years of management and technical experience in the U.S Department of Energy (“DOE”) and U.S. Department of Defense (“DOD”) environmental and construction markets as a corporate officer, senior project manager, co-founder of a consulting firm, and federal employee. For the immediate five years prior to joining the Company in June 2016, Mr. Duff was responsible for the successful completion of over 70 performance-based projects at the Paducah Gaseous Diffusion Plant (PGDP) in Paducah, KY. At the PGDP, he served as the Project Manager for the Paducah Remediation Contract, which was a five-year project with a total value of $458 million. Prior to the PGDP project, Mr. Duff was a senior manager supporting Babcock and Wilcox (B&W), leading several programs that included building teams to solve complex technical problems. These programs included implementation of the American Recovery and Reinvestment Act (ARRA) at the DOE Y-12 facility with a $245 million budget for new cleanup projects completed over a two year period.  During this period, Mr. Duff served as project manager leading a team of senior experts in support of Toshiba Corporation in Tokyo, Japan to integrate United States technology in the recovery of the Fukushima Daiichi Nuclear Reactor disaster. Prior to joining B&W, Mr. Duff served as the president of Safety and Ecology Corporation (SEC). As President of SEC, he helped grow the company from $50 million to $80 million in annual revenues with significant growth in infrastructure, marketing, and client diversification. Mr. Duff has an MBA from the University of Phoenix and received his B.S. from the University of Alabama.

Dr. Louis F. Centofanti

Dr. Louis F. Centofanti


Dr. Centofanti currently holds the position of Executive Vice President of Strategic Initiatives. Effective January 26, 2018, Dr. Centofanti was appointed to the position of President of Perma-Fix Medical, a majority-owned foreign subsidiary of the Company.  From March 1996 to September 8, 2017 and from February 1991 to September 1995, Dr. Centofanti held the position of President and Chief Executive Officer of the Company. Dr. Centofanti served as Chairman of the Board from the Company’s inception in February 1991 until December 16, 2014. In January 2015, Dr. Centofanti was appointed by the U.S Secretary of Commerce Penny Prizker to serve on the U.S. Department of Commerce’s Civil Nuclear Trade Advisory Committee (CINTAC). The CINTAC is composed of industry representatives from the civil nuclear industry and meets periodically throughout the year to discuss the critical trade issues facing the U.S. civil nuclear sector. From 1985 until joining the Company, Dr. Centofanti served as Senior Vice President of USPCI, Inc., a large publicly-held hazardous waste management company, where he was responsible for managing the treatment, reclamation and technical groups within USPCI.  In 1981, he founded PPM, Inc. (later sold to USPCI), a hazardous waste management company specializing in treating PCB contaminated oil.  From 1978 to 1981, Dr. Centofanti served as Regional Administrator of the U.S. Department of Energy for the southeastern region of the United States.  Dr. Centofanti has a Ph.D. and a M.S. in Chemistry from the University of Michigan, and a B.S. in Chemistry from Youngstown State University.

Mr. Ben Naccarato

Mr. Ben Naccarato

Chief Financial Officer, Vice President and Secretary

Mr. Naccarato has served as the Chief Financial Officer (CFO) since February 26, 2009.  Mr. Naccarato joined the Company in September 2004 and served as Vice President, Finance of the Company’s Industrial Segment until May 2006, when he was named Vice President, Corporate Controller/Treasurer. In July 2015, Mr. Naccarato was named the CFO of PF Medical, the Company’s majority-owned Polish subsidiary involved in the research and development of a new medical isotope production technology. Effective December 22, 2015, Mr. Naccarato was appointed to the Management Board of PF Medical. Mr. Naccarato has over twenty nine years of experience in senior financial positions in the waste management and used oil industries. From December 2002 to September 2004, Mr. Naccarato was the CFO of a privately held company in the fuel distribution and used waste oil industry. Mr. Naccarato is a graduate of University of Toronto having received a Bachelor of Commerce and Finance Degree and is a Chartered Professional Accountant, Certified Management Accountant (CPA, CMA).

George Taylor

Vice President of Waste Services Business Development and Sales

Mr. Taylor brings 35 years of experience in senior management and business development roles within the nuclear industry. Mr. Taylor previously served as the Vice President of Business Development for Visionary Solutions, LLC (VS) and a director of its joint venture company, Aleut World Solutions, where he was responsible for day to day operations and successfully led the joint venture's return to profitability and expanded operations, including securing a $100M contract with the U.S. Army Core of Engineers for the transport and disposal of low-level radioactive waste nationwide. He has led engineering and procurement projects with multiple U.S Department of Energy (DOE) and National Nuclear Security Administration (NNSA) laboratories, while working to support naval reactors and as DOE Y-12 National Security Complex Liaison with the Department of Commerce's Manufacturing Extension Partnership. Mr. Taylor holds Bachelor degree in Materials Science Engineering from Rice University and an MBA from George Washington University.

Chris Reno

Director of Nuclear Services Business Development

Mr. Reno brings over 30 years' experience, including senior management, as well as sales and marketing of professional engineering and nuclear management services. From 1994 to 2017, he held a variety of roles within Atkins (formerly EnergySolutions, Duratek, Scientific Ecology Group and Westinghouse), where he placed over $1 billion of service contracts with every major DOE and NNSA facility in the United States. During his tenure, his primary focus was managing sales of "Tier II" services to the federal government DOE contractors. His responsibilities included review and response to federal solicitations and procurement regulations, managing all aspects of proposal development, strategic planning, initial contacts, understanding client needs, proposal development, closing, contracts management and presentations to senior management. Mr. Reno has a Bachelor in Science degree in Economics from California Polytechnic State University in San Luis Obispo.

Brian Wood

Director of Commercial and Utility Business Development

Mr. Wood brings more than 15 years of experience in hazardous waste, radioactive waste operations, emergency management, chemical hazards, disaster preparedness, environmental compliance, emergency response, and hazard identification. Mr. Wood previously served as the waste management manager at EnergySolutions, Inc., where he was responsible for leading the planning of radioactive waste management projects in Asia including Fukushima and decommissioning projects in Japan. Previously, Mr. Wood was employed as Senior Manager, Radioactive Waste & Spent Fuel at Tennessee Valley Authority where he developed numerous contracts for disposal, processing and transporting radioactive waste. He is a former Staff Sergeant with the Air National Guard and Senior Airman in the United States Air Force.