Ronald Butler Jr. is a Certified Public Accountant (CPA) with more than 30 years of experience in audit, financial and strategic planning, operational excellence, digital transformation, and corporate governance across industries including mining and metals, energy, technology, and consumer products.

Mr. Butler spent 29 years with Ernst & Young LLP (EY) in Arizona, most recently serving as Managing Partner from 2008 until his retirement in 2024. From 2022 to 2024, he also served as EY’s U.S. Mining & Metals Leader, where he led national strategy and drove client and business growth, advising major mining companies such as Freeport-McMoRan and Newmont Corporation. As Managing Partner, Mr. Butler led EY Arizona’s growth initiatives and strategic ventures, including public-sector programs focused on cost reduction, grants management, real estate optimization, and technology enablement. He also served on the Executive Committee for the City of Phoenix’s US$500 million General Obligation Bond Program and was a senior member of EY’s West Region Executive Leadership Team. During his tenure, he oversaw more than 500 professionals and advised a broad range of midsize and multinational public and private companies. Mr. Butler holds a BSc in Accountancy from the University of Arizona.