Board of Directors

Since September 2016, Ms. Estes has served as the Finance Manager of 10 Branch Management LLC, a private entity which governs the Jay and Renee Haladay Family Office, where she has established the mission, governance, policy, procedures, systems and reporting for the family offices which handles the investment and other affairs of five families. For more than fifteen years, Ms. Estes has partnered with investors, entrepreneurs, financiers, developers, and operators to achieve economic success for ventures in multiple industries and, at times, extreme market conditions. Ms. Estes received her BA in Business Administration with a Major in Finance from Washington State University.

Mr. Gannon is currently the President and Chief Executive Officer of 374Water. Mr. Gannon brings over 25 years of domestic and international experience across all stages of the business cycle. Mr. Gannon served as the Chief Executive Officer and President of National Fire and Safety from December 2020 until November 2022. From November 2020 until February 2018, Mr. Gannon was the Chief Executive Officer and President of Energy Recovery, Inc. (Nasdaq: ERII), after previously serving as the company’s Chief Financial Officer from April 2015 to August 2018. Prior to joining Energy Recovery, from January 2009 until May 2015, Mr. Gannon was a Managing Director at Conway MacKenzie where he served as a restructuring advisor to the City of Detroit throughout its landmark $18 billion Chapter 9 bankruptcy. From June 2005 until December 2008, he served as a Principal and Vice President of Talon Equity Partners.  Mr. Gannon earned an MBA from The University of Chicago Booth School of Business and a B.S. in Engineering from The University of Michigan College of Engineering.

Dr. Deschusses is a co-founder of 374Water and patent inventor of the supercritical water oxidation AirSCWO system. He served as the Chief Technology Officer of 374Water from inception in July 2018 until 2022. Dr. Deshusses holds a Ph.D. in chemical engineering from the Swiss Federal Institute of Technology, Zurich (1994) and a BS in chemical engineering from the Swiss Federal Institute of Technology, Lausanne (1990). He is a professor of civil and environmental engineering at Duke University since 2008. Previously, he was a professor of civil and environmental engineering and department chair at the University of California Riverside from 1994 – 2008. He is a world-renowned researcher in biofiltration, odor, and novel waste-to-energy technologies. Dr. Deshusses has been the principal investigator for the supercritical water oxidation development project at Duke University since 2013.

Mr. Davis joined our board in February 2008, and served as the Chief Executive Officer from August 2011 to April 2021. He received a B.S degree in economics from Florida State University in 1982. He joined First Equity Corporation (“First Equity”) in Miami that same year. First Equity operated as a regional full-service brokerage and investment bank. Mr. Davis’ duties included equity deal structure and brokerage-related activities. After First Equity was acquired in 2001, Mr. Davis joined the corporate finance department of William R. Hough & Company (“Hough”), where he continued structuring equity finance and private acquisitions. Hough was acquired in 2004 by RBC Dain Rauscher (“Dain”), a global investment banking firm. Dain consolidated Hough’s corporate finance activities into its New York offices. Mr. Davis elected to remain in Miami and joined Martinez-Ayme Securities (“MAS”), assuming the newly-created position of managing director of corporate finance. In 2005, Mr. Davis resigned from MAS and ceased working as an investment banker.

Since January 2013, Mr. Penn has served as the Chief Executive Officer of Genesis IV, an executive consulting firm and Penn Construction Group, both headquartered in the Washington D.C. Metro area. Mr. Penn was Acting Secretary of the US Navy from March to May 2009, having previously been Assistant Secretary of the US Navy (Installations and Environment) since 2005. He began his career as a Naval Aviator and was named EA-6B Pilot of the Year in 1972. Throughout his distinguished career, significant leadership assignments included: Executive Officer/Commanding Officer VAQ 33, Battalion Officer at the US Naval Academy, Air Officer in USS America, Special Assistant to the Chief of Naval Operations, Commanding Officer of NAS North Island, CA, and Deputy Director of the Navy Office of Technology Transfer & Security Assistance. Mr. Penn left the Navy in 1995, joining Loral Corporation as Director of International Business. In 1996, Loral sold its defense electronics and system integration businesses to Lockheed Martin and Mr. Penn was assigned to Lockheed Martin’s Corporate Staff. Mr. Penn returned to the US Navy in 2001 as Director of Industrial Base Assessments.

Mr. Penn received his BS in Industrial Technology from Purdue University and his MS in Human Resource Management & Personnel Administration from The George Washington University. Mr. Penn serves on the Secretary of Defense Policy Board, as Trustee Emeritus at The George Washington University and the Boards of the National Trust for the Humanities, Naval Aviation Museum and Naval Historical Foundation. Mr. Penn also serves as the Chairman of the Board of Directors Spectra System Corporation, a London Stock Exchange listed company (SPSY) and on the Board of Directors of Healthcare Trust Inc., a Nasdaq listed company (HTIA).

Since December 2018, Mr. Vanderhider has served as President of Aspen View GP, LLC. Previously, Mr. Vanderhider served as a Principal, Executive Vice President and Chief Financial Officer of EnerVest, Ltd. from 1996 until 2018. He was responsible for building EnerVest’s private equity business and for the oversight of the institutional investments. During such tenure, he led initiatives for raising over $8 billion of private equity and over $12 billion of total institutional capital, securing over 150 institutional investors. Such investors included a diversified group of pension funds, endowments, foundations, family offices, insurance companies, fund of funds, international investors and other financial institutions.

Mr. Vanderhider currently serves as President of the Foundation of Goodwill Industries of Houston, along with serving on the Audit Committee of Goodwill Industries of Houston. During 2019, he joined the Advisory Board of Midway Companies, a privately owned, multi-billion dollar fully integrated real estate development and investment firm based in Houston, Texas. During 2023, he joined Container Holdings, LLC (CH), a holding company for Equipment Management Services, LLC (EMS), as a managing member. EMS is a Texas-based business of CH providing shipping and storage container solutions to numerous industries.

Mr. Vanderhider holds a BA of Business Administration degree in Accounting from Texas A&M University and is a Certified Public Accountant.