Hadron Energy Appoints Previous TerraPower COO Eric Williams as Executive Vice President of Engineering

Previous TerraPower COO and Advanced Reactor Pioneer Joins Hadron to Lead its Engineering Organization as it Accelerates its Execution Toward Halo MMR Commercialization

NEW YORK, NY - August 10, 2026 - Hadron Energy, Inc. (Nasdaq: HDRN), an advanced nuclear technology company developing the Pressurized Water Reactor (PWR) Halo Micro-Modular Reactor (MMR), announced today that Eric Williams has joined the Company as Executive Vice President of Engineering, effective August 31, 2026. Eric brings three decades of advanced reactor engineering leadership, operational excellence, and first-of-a-kind reactor commercialization experience, most recently as Executive Vice President (EVP) and Chief Operations Officer (COO) of TerraPower, where he oversaw the successful Nuclear Regulatory Commission (NRC) approval of the Natrium Construction Permit, a historic milestone for advanced Small Modular Reactor (SMR) deployment in the United States.
‍
The appointment represents a critical inflection point for Hadron as a newly public company (Nasdaq listing, May 2026), which continues to invest heavily in building a world-class innovative Engineering organization, now to be led by an industry-recognized expert. With zero debt on its balance sheet, recent NRC licensing milestones (Quality Assurance Program Description acceptance, Principal Design Criteria whitepaper submittal), and a growing portfolio of strategic partnerships (GSE Systems for simulator supply, ConverDyn for uranium fuel supply and conversion), Hadron is now positioned to accelerate the engineering execution, organizational scaling, and regulatory discipline required to bring a first-of-a-kind commercial microreactor to market at an accelerated timeline schedule. Eric's appointment signals Hadron's commitment to institutional-grade engineering leadership and the operational rigor expected of a public company executing on advanced nuclear technology, while joining the world renowned experts on Hadron’s leadership team.

A Track Record in First-of-a-Kind Advanced Reactor Leadership

Eric joins Hadron from TerraPower, where he spent the last 12 years of his career rising to the EVP and COO rank, overseeing all operational functions including Engineering, Nuclear Fuel, Regulatory Affairs, Supply Chain, Quality, and Operations across TerraPower's portfolio of advanced reactor projects. Under his operational leadership, TerraPower achieved a historic milestone: NRC approval of the Natrium Construction Permit, the first Construction Permit issued for a commercial advanced SMR design in the United States.

As Senior Vice President and Design Authority for the Natrium Demonstration Project, Eric served as Head of Engineering for the 345 MWe advanced SMR, with direct responsibility for all engineering and testing across the design, configuration management, technical decision-making, and project governance. During his tenure, he submitted the first NRC Construction Permit Application for a commercial advanced reactor, established the company's Design Control program and Design Authority functions, and developed the integrated decision-making process that guided engineering execution.

Prior to his operational roles, Eric scaled TerraPower's engineering organization from 60 to 180 engineers over a period of 4 years, established company-wide engineering standards and training, and reformed engineering procedures to implement NQA-1 quality assurance standards. His earlier career spans B&W mPower (small modular reactor safety analysis and design), Framatome (nuclear safety, severe accident analysis, and materials engineering for the operating reactor fleet), and roles in aerospace and space operations. Eric holds an M.B.A. from the University of Lynchburg and a B.S. in Mechanical Engineering from the University of Florida, and is a licensed Professional Engineer.

Strategic Leadership Role: Engineering Excellence for Commercialization

As EVP of Engineering, Eric will oversee Hadron's complete engineering organization including Hardware, Software, Systems, Product, Manufacturing, Test & Validation, Quality, Program Management, and Operations. As a member of the Executive Leadership Team, he will drive engineering strategy and product execution from concept through commercialization, establish engineering standards and technology roadmaps, optimize design for manufacturability and cost, lead organizational scaling, and manage the tight schedule toward commercialization of the Halo MMR.

“I have spent my career proving that advanced nuclear technology can be engineered, licensed, and deployed in the United States. The mission at Hadron to commercialize a first-of-a-kind microreactor (MMR) is exactly where the nuclear industry needs to go. Sam and the leadership team have built a disciplined, well-capitalized public company with the partnerships, regulatory milestones, and engineering rigor to execute. My role is to see the entire go-to-market (GTM) program of Hadron’s Halo become the first ever regulated and commercialized MMR in the world, by building and scaling that engineering organization to become the world-class nuclear engineering team, attract the best industry brain-power of nuclear engineers to our team, establish the culture and systems that will deliver on this timeline, and ensure that every decision is made with the long-term credibility and success of the Company’s business in mind.”
- Eric Williams, Executive Vice President of Engineering, Hadron Energy

“On behalf of the Hadron Board of Directors and Leadership team, I am delighted to welcome Eric on board. Eric brings exactly what a public company needs to execute on advanced nuclear: operational discipline, first-of-a-kind experience, NRC expertise, and the proven ability to build and scale engineering organizations in support of our aggressive GTM program. He sat in the room when TerraPower received the first Construction Permit for an advanced reactor. He has written NRC applications, managed billion-dollar projects, and built engineering cultures from scratch as part of a meaningful SMR industry pioneer. That experience is invaluable as we move into commercialization. With Eric leading engineering, our investors and customers can trust that our technical roadmap and delivery schedule are led by someone with highly relevant expertise.”
- Sam Gibson, Founder and Chief Executive Officer, Hadron Energy

Investor and Media Contact

Hadron Energy Investor Center: https://www.hadronenergy.com/investor-relations
Samuel Gibson, Chief Executive Officer
sgibson@hadronenergy.com

‍