Mr. Sheriff, as the founder and Executive Chairman, has advanced the company from inception to a uranium producer with a multi-jurisdictional United States asset base. Mr. Sheriff has raised over $600 MM in the public markets and has extensive experience in mergers and acquisitions.
Mr. Sheriff is an entrepreneur and visionary with over 40 years of experience in the minerals industry and the securities industry and has been responsible for significant capital raises along with corporate development. Mr. Sheriff was a pioneer in the uranium renaissance as co-founder and Chairman of Energy Metals Corp. and was responsible for compiling the largest domestic uranium resource base in US history before the company was sold for $1.8 Billion in 2007. With his in-depth understanding of the nuclear industry and market conditions, plus his knowledge of the financial markets, Mr. Sheriff is regarded as a leader and avid supporter of nuclear energy as a clean and reliable energy source for the United States.
Mr. Sheriff also has a significant interest in the gold exploration sector with personal and corporate gold exploration assets across the United States and Canada. He is a Director and co-founder of Group 11 Technologies Inc, a private company committed to the development and application of environmentally and socially responsible precious metals mineral extraction as an alternative to conventional mining methods. Mr. Sheriff holds a B.Sc. degree (Geology) from Fort Lewis College, Colorado and an MSc in Mining Geology from the University of Texas-El Paso. He has compiled one of the largest privately-held mining databases in the world, providing enCore with exclusive access to proprietary uranium projects.
Mr. Willette is an accomplished general counsel and business executive with 20+ years of experience managing corporate legal functions for public and privately held entities across a multitude of sectors, including industrial, manufacturing, transportation, oil & gas, and renewables.
He brings with him broad experience in corporate law and sophisticated commercial transactions, including securities, capital market transactions, mergers and acquisitions (M&As), divestitures, as well as significant experience in manufacturing, real estate, governance, compliance, intellectual property, and international operations and transactions. Most recently Mr. Willette served as ProFrac Holding Company’s Chief Legal Officer, Chief Compliance Officer and Corporate Secretary, a multi-billion dollar publicly traded oil and gas services and technology company. Mr. Willette holds a B.S., an M.B.A., and a J.D. from the University of Kansas.
Mr. Pelizza has spent 45 years in the uranium industry with project experience including the Alta Mesa, Benavides, Kingsville Dome, Longoria, Palangana, Rosita, West Cole and the Vasquez projects, all in Texas.
He was also responsible for the permitting and licensing of the Church Rock, Crownpoint, and Unit 1 projects in New Mexico and the North Platte project in Wyoming. Currently, Mr. Pelizza is the Principal of M.S. Pelizza & Associates LLC, where he represents extractive industry clients. He previously served as Sr. Vice President of Health, Safety and Environmental Affairs with Uranium Resources, Inc. He has also previously worked with Union Carbide Corp. Mr. Pelizza received his B.S. in Geology from Fort Lewis College and his M.S. in Geological Engineering from the Colorado School of Mines. He is a licensed Professional Geoscientist in Texas and a Certified Professional Geologist with the American Institute of Professional Geologists. He is the Past Chairman of the Texas Mining and Reclamation Association and the Past Chairman of the Uranium Producers of America.
Mr. Harris is a partner in Solo Management Group, LLC, an investment and management consulting partnership.
He was previously a board member of Energy Metals Corporation, Chairman and Executive Committee member of the American Fiber Manufacturers Association, and President and Chief Executive Officer of Hoechst Fibers Worldwide, the global acetate and polyester business of Hoechst AG. At Hoechst Fibers Worldwide, Mr. Harris managed the business’ $5 billion operation, comprised of 21,000 employees and production locations in 14 different countries. Harris is currently a Director of Scandium International Mining Corp. Mr. Harris is a graduate of Harvard College, BA in English, and Columbia University Graduate School of Business, MBA in finance.
Dr. Dennis Stover played a defining role in the emergence and evolution of uranium In-Situ Recovery (ISR) technology in the United States. Beginning his work in Texas in the early 1970s, he brought a rare combination of scientific discipline and practical engineering to a technology that would go on to transform how uranium is produced around the world.
Over his 50-year career, Dr. Stover remained at the center of ISR’s technical and operational advancement. He contributed to early field programs, helped refine the chemistry and hydrology behind uranium recovery and aquifer restoration, and was directly involved in translating laboratory theory into large-scale production. At a time when ISR was still unproven, he helped make it work—and helped ensure it worked safely and sustainably.
Dr. Stover held senior roles with some of the most influential uranium companies in the ISR space. He served as Chief Engineer for Everest Minerals Corporation, Chief Operating Officer of Energy Metals Corporation, and Executive Vice President, Americas for Uranium One, where he oversaw the commercial development of assets across Texas, Wyoming, and beyond. He later served as Chief Executive Officer of enCore Energy, guiding the next chapter of ISR development in the United States.
His technical legacy is also deep and lasting. Dr. Stover holds six U.S. patents related to ISR uranium recovery and aquifer restoration and has co-authored multiple guidebooks for the International Atomic Energy Agency. He is widely recognized for both his innovation and his dedication to advancing ISR as a clean, practical solution to fuel the future of nuclear energy.
With degrees in chemistry and chemical engineering from Kalamazoo College and the University of Michigan, Dr. Stover brought rigor, imagination, and persistence to every stage of ISR’s history—and his work continues to shape the industry today.
Ms. Hoxie-Key is a proven nuclear industry leader, with more than 40 years of engineering experience covering nuclear core design, nuclear fuel-related licensing, nuclear fuel procurement, oversight of nuclear fuel-related engineering products, and direct support of reactor operations.
She worked for Southern Nuclear Operating Company (SNC) for 31 years, where she directed and conducted complex multi-disciplinary projects involving in-reactor fuel performance, fuel procurement, fuel-related licensing, and core design. She also served as the SNC lead for nuclear industry efforts to increase the uranium enrichment limit above 5 weight percent and to increase the current licensed fuel burnup limit. Ms. Hoxie-Key was a 2008 winner of the American Nuclear Society (ANS) Oestmann Achievement Award for technical achievement in the fields of nuclear science, engineering, research, or education. She has also held numerous nuclear industry leadership roles across the years, including Chairman of the World Nuclear Fuel Market (WNFM) Board of Governors between June 2016 and June 2018, and member of the Nuclear Energy Institute (NEI) Accident Tolerant Fuel Safety Benefits and Licensing Task Forces. Ms. Hoxie-Key earned her bachelor’s degree in nuclear engineering from Mississippi State University and her master’s degree in nuclear engineering from Georgia Institute of Technology. She is a registered Professional Engineer in Alabama and Georgia.
Mr. Tewalt is an economic geologist with over 40 years of experience in the uranium, precious metals, and base metals industries. After beginning his career as an exploration geologist working throughout the western U.S., he transitioned to founding and managing Canadian public companies. In 2003, anticipating a rise in uranium prices, Mr. Tewalt formed a private company to assemble uranium resource properties in the southwestern U.S., which became Standard Uranium in 2004. As the uranium market strengthened, he led the company’s shift from exploration to production through the acquisition of the Palangana deposit and Hobson processing plant in South Texas, and brought on ISR pioneer Dr. Dennis Stover to lead operations.
Following the acquisition, Mr. Tewalt worked with Energy Metals founder William Sheriff to merge the two companies in 2006, creating a stronger producer-focused platform. Energy Metals was acquired by Uranium One in 2007 in a $1.8 billion transaction, generating returns of up to 2600% for early Standard Uranium investors. Between 2007–2012, Mr. Tewalt focused on precious metals companies before reuniting with Mr. Sheriff to transition Wolfpack Gold into Tigris Uranium, anticipating the next uranium cycle. Tigris assets later formed the foundation for enCore Energy Corp where Mr. Tewalt served as a Director from 2017 to 2022.
Mr. Tewalt has been involved in precious and base metal discoveries throughout his career, including Rock Lake (Montanore, Montana, 1984), Lincoln Mine and satellite discoveries (California’s Mother Lode, 1988–1990), Storm (Carlin Trend, Nevada, 1994), Hollister (Northern Nevada Rift, Nevada, 1998), and Cordero (Gallium resource, 2001). He has served as President and CEO of Great Basin Gold, Standard Uranium, Colombian Mines, Nevgold Resources, Wolfpack Gold, and Silver Predator. He is currently Chairman of Silver Predator Corp. and co-owner of Troy Resources LLC.