Ms. Donadio was appointed lead independent director of Marathon Oil’s board of directors in May 2021. She’s been a board member since 2014.

She retired as a partner of Ernst & Young LLP (a multinational professional services firm) in 2014. Prior to her retirement, Ms. Donadio was Americas Oil & Gas Sector Leader for Ernst & Young LLP from 2007, with responsibility for one of Ernst & Young’s significant industry groups helping set firm strategy for oil and gas industry clients in the United States and throughout the Americas. Ms. Donadio joined Ernst & Young LLP in 1976, and from 1989 served as an audit partner for multiple companies in the oil and gas industry. During her tenure as a partner with Ernst & Young LLP, Ms. Donadio held various energy industry leadership positions. She has audit and public accounting experience with a specialization in domestic and international operations in all segments of the energy industry.

Ms. Donadio is a member of the board of directors of NOV, Inc., Norfolk Southern Corporation, and Freeport-McMoRan, Inc. She is also a member of the board of directors of Theatre Under the Stars and Houston Food Bank. Marcela is a member of the National Board of the Louisiana State University Foundation and a trustee for the Bishop Quin Foundation of the Episcopal Diocese of Texas.

Ms. Donadio holds a B.S. in accounting from Louisiana State University and is a licensed certified public accountant in the State of Texas.