Neal Froneman at Mining Indaba 2024. Credit: Mining Indaba/YouTubeSuperCritical Materials has appointed Neal Froneman, Sibanye-Stillwater’s founder and former CEO, as its new chair of the board of directors. Froneman joins SuperCritical with more than three decades of executive leadership experience in global mining, resource development and capital markets. Froneman retired from Sibanye-Stillwater in Sept. 2025 following 12 years at its helm. “Neal has spent his career building resource companies, developing complex industrial projects and creating long-term value for shareholders," said Alexander Canon Bryan, SuperCritical’s CEO. An investor in SuperCritical, Froneman says he was drawn to the company by its market opportunity and the company’s approach to fuel‑production infrastructure.