Management Team

Mr. Duff has held the position of President and CEO of the Company since September 2017 and a Board member since April 2023. Since joining the Company in 2016, Mr. Duff has developed and implemented strategies to meet growth objectives in both the Treatment and Services Segments. In the Treatment Segment, he continues to upgrade each facility to increase efficiency, and modernize and broaden treatment capabilities to meet the changing markets associated with the waste management industry. This growth includes expansion into international markets and additional market sectors, including development of new clients in the commercial power and oil and gas industries. In the Services Segment, which encompasses all field operations, he has completed the revitalization of business development programs, which has resulted in increased competitive procurement effectiveness, and broadened the market penetration within both the commercial and government sectors. Within the Services Segment, Mr. Duff has established a team of professionals with experience in conducting safe and efficient field operations while addressing complex technical challenges associated with removal of radioactive and hazardous waste contamination. Mr. Duff has over 40 years of management and technical experience in the DOE and the DOD environmental and construction markets as, variously, a corporate officer, senior project manager, co-founder of a consulting firm, and federal employee. Mr. Duff has an MBA from the University of Phoenix and received his B.S. from the University of Alabama.

Dr. Centofanti, the founder of the Company and a director of the Company since its inception in 1991, has held the position of EVP of Strategic Initiatives since September 2017. From March 1996 to September 8, 2017 and from February 1991 to September 1995, Dr. Centofanti held the position of President and CEO 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 (“SVP”) 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 and Mark Zwecker, a current Board member of the Company, 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 (“DOE”) 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. Eshleman has served as the Company’s COO since January 23, 2025. Mr. Eshleman has more than 34 years’ experience in radioactive waste management facility operations, environmental remediation, hazardous and radioactive material logistics, and facility decommissioning.  Mr. Eshleman specializes in commissioning commercially viable solutions to radioactive waste challenges and improving facility operational performance.  Prior to joining Perma-Fix, Mr. Eshleman founded in 2019 and served until 2024 as the President of Oakleaf Environmental, Inc., a consulting firm specializing in mergers and acquisitions, business strategy and integration, and technical support to a variety of private equity and commercial clients, as well as the U.S Department of Energy, and Naval Reactors, the U.S. government office that has comprehensive responsibility for the safe and reliable operation of the United States Navy's nuclear reactors. Mr. Eshleman was previously employed by EnergySolutions, Inc., a privately-held nuclear services company that is one of the largest processors of low level radioactive waste (LLW) in America, and its predecessor companies for 27 years in a variety of positions of increasing responsibility focused on the leadership of North American waste processing facility operations, nuclear power plant decommissioning, logistics, international project management, and business development roles, including as Senior Vice-President of Corporate Business Development and Strategy, Senior Vice President of Commercial Waste Processing, Senior Vice-President of Global Logistics, Senior Vice-President of Decommissioning Operations, and Senior Vice-President of EnergySolutions Italia S.r.l. Mr. Eshleman holds a B.S. in Civil Engineering Technology from the University of Pittsburgh.

Mr. Naccarato has served as the Company’s CFO since February 2009. Mr. Naccarato joined the Company in September 2004, holding the positions of Vice President of Finance for the Company’s Industrial Segment until May 2006, when he was named Vice President, Corporate Controller/Treasurer. Mr. Naccarato has over 37 years of experience in senior financial positions in the waste management and used oil industries. Mr. Naccarato was the CFO of a privately-held company in the fuel distribution and used waste oil industry from 2002 to 2004 and prior to that served in numerous senior financial roles in the waste management industry in both the US and Canada. Mr. Naccarato is a graduate of the University of Toronto with a Bachelor of Commerce and Finance Degree and is a Chartered Professional Accountant, Certified Management Accountant (CPA, CMA).

Since March 2021, Mr. Naccarato has served as an independent director and as a member of the Audit Committee, the Compensation Committee, and the Strategic Initiatives Committee of PyroGenesis, Inc., a high-tech company involved in the design, development, manufacture and commercialization of advanced plasma processes and products and whose stock is listed for trading on the Toronto Stock Exchange.

Mr. Grondin has held the position of EVP of Hanford and International Waste Operations since January 23, 2025. Prior to his appointment to such office, Mr. Grondin previously served as the Company’s EVP of Waste Treatment Operations since July 2020. Since joining the Company in 2002, Mr. Grondin has held various positions within the Company’s Treatment Segment, including Vice President of Technical Services, Vice President/General Manager of the Perma-Fix Northwest Richland, Inc. Facility and Vice President of Western Operations. Mr. Grondin, a Project Management Professional, has over 35 years of management and technical experience in the highly regulated and specialized radioactive/hazardous waste management industry with the majority of his experience concentrated on managing start-up waste management processing and disposal facilities for four different organizations in the commercial and government sectors. Prior to joining the Company, Mr. Grondin held the position of Vice President of Mixed Waste Operations for Allied Technology Group in Richland, Washington; Vice President of Operations for Waste Control Specialists in Andrews Texas; and Technical Manager/Director of Operations for Rollins Environmental Services Facility in Deer Trail, Colorado. Mr. Grondin is recognized in the United States and Canada as an authority in hazardous and mixed waste treatment. Mr. Grondin has a Diploma of Collegial Studies in Pure and Applied Sciences from CEGEP of Amiante (Thetford-Mines, Canada) and Analytical Chemistry Techniques from CEGEP of Ahuntsic (Montreal, Canada), a Geography minor from Montreal University (Montreal, Canada) and a Certificate of Business Management from the School of Higher Commercial Studies from Montreal University (Montreal, Canada).