All Predicus partners have long-standing business and personal relationships among themselves that extend over 25 years or more in addition to serving a myriad of commercial and government clients throughout the world.

Ralph H. Stoll
Senior Partner | President

Ralph Stoll is an engineer with over 38 years of experience in business development, strategic planning, and project management. His business experience includes detailed knowledge of the nuclear fuel cycle including naval nuclear power plant operations, fissile material disposition and international nuclear waste management. He was a venture partner for operations in a private equity investment company funding the direct commercialization of intellectual property where he developed procedures and processes to analyze over 150 technologies for initial investments. An experienced leader and project manager, he completed a 27-year career in the United States Navy in the rank of Captain, commanded three nuclear-powered submarines, and while at NATO Headquarters in  Brussels, Belgium in the early 1990s started the first military cooperation programs with Russia and other countries of the former Soviet Union.

John T. Greeves
Senior Partner

John Greeves is an engineer with 35 years of experience providing leadership on risk-informed and performance-based regulatory processes and evaluation of regulatory strategy. He supervised and helped develop both regulations and guidance to implement risk-informed, performance-based approaches to siting, design and construction of nuclear facilities. As an NRC staff director, he was responsible for development and promulgation of NRC’s first fully risk-oriented rule making, 10 CFR Part 63: Disposal of High Level Radioactive Wastes in a Geologic Repository at Yucca Mountain, Nevada.

James W. Voss
Senior Partner

Jim Voss is a nuclear engineer with 35 years of professional experience associated with the safe management of nuclear materials. He has been responsible for nuclear waste engineering and radioactive facility and site remediation activities in the United States, the United Kingdom, Australia, Canada, Japan, Germany, Hungary and other countries. Mr. Voss has been the chief executive of companies in the US, Europe and Australia, including raising venture capital, project debt, establishing securitized revenue streams, and executing corporate strategic initiatives. He is a Director of companies in the US and the UK, a Fellow of the UK Nuclear Institute, a licensed engineer in the European Union (EurIng) and a Chartered Engineer in the UK.

James A. Hamilton
Senior Partner

Jim Hamilton is a professional engineer who specializes in the social and political risk management of complex energy, infrastructure and natural resource projects. His experience ranges from advising the U.S. Department of Energy on its nuclear waste management program to assisting operating utilities plan and execute nuclear power plant decommissioning. Jim has also advised Canada’s First Nation’s communities, served as the Americas Vice President of Sustainability for a multinational mining and mineral processor and taught graduate students in MIT’s Environmental Policy Program. His volunteer work includes serving as Co-Chairman of MIT’s Energy, Environment and Sustainability Global Collaboration Committee.

David L. Pentz
Founding Partner | Chairman Emeritus

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