NexGen Resources Corporation, a natural resource company which manages procurement and handling of over 9 million tons of coal per year, mine development and operations, coal-based alternative fuel and clean coal technology commercialization, and oil and gas resource development. Previously nominated by the Secretary of Energy to the National Coal Council, Charlie is a former director of the National Coal Association and the Colorado Mining Association. He is currently a member of the American Coal Council, Tau Beta Pi Engineering Society, Council of Energy Advisors, Society of Mining Engineers of AIME, and the National Coal Transportation Association. Charlie received his B.S. in Mining Engineering from the Colorado School of Mines in 1971.

Prior to his appointment as Interim President and Chief Executive Officer, Greg served as Chief Financial Officer, Treasurer and Secretary of ADES from March 2018 through June 2020. In addition, he previously served as Chief Accounting Officer and held various other roles with ADES. Greg has over 15 years of experience related to accounting, finance and leadership of various teams. Prior to joining ADES, Greg was a Senior Manager in the assurance practice at Ernst & Young, LLP in both Dallas and Denver, where he served at a variety of public and private clients. Greg received his B.S. in Accounting and M.S. in Finance from Texas A&M University. Greg is a licensed CPA in Texas and Colorado and is a member of the AICPA and the Colorado Society of CPAs.

and building the company’s divisions and portfolio companies. He began his career as a Certified Public Accountant working for Coopers and Lybrand. Randy holds a B.S. degree in Accounting from Wittenberg University.

Prior to joining Tinuum, Rick served as CFO of private and public companies in the financial services, utility, telecom, and manufacturing industries, including acting as CFO of Cadre Services, a proppant mining company for the oil and gas industry. He also spent 10 years with Denham Capital Management LP, a private equity firm that invests in power, energy and mining. Rick has a B.S. degree in Industrial Distribution from Clarkson University and an M.B.A from the Sloan School at MIT.

He has spent his career focused on value-oriented investing across the capital structure. Gilbert served as an investment analyst for JMB Capital Partners and previously held the roles of portfolio manager, trader, and investment analyst at Merrill Lynch, Watershed Asset Management, and J.P. Morgan Investment Management.
Gilbert attended the University of California, Berkeley with majors in Chemical Engineering and Material Science Engineering.

He has over 20 years of experience investing across the capital structure in a variety of industries, including energy, financial institutions, chemicals and other basic industries. Currently a Director on the Boards of several public and private companies in the energy, insurance, health & wellness, and customer loyalty industries, he’s also a Trustee of Western Reserve Academy in Hudson, Ohio. Spencer earned a B.A. from Wesleyan University and an M.B.A. with Honors in Finance from Columbia University.