Marcela E. Donadio is a former Audit Partner and Americas Oil & Gas Sector Leader at Ernst & Young, LLP, where she spent 25 years as an audit partner. A Certified Public Accountant, she also serves on the boards of NOV Inc. and Freeport-McMoRan and previously was Lead Independent Director of Marathon Oil. She chairs Norfolk Southern's Audit and Finance Committee and serves on the Executive and Safety Committees.