Summit Materials, Inc. announced that its board of directors has appointed Tamla Oates-Forney as a new independent director and member of the board’s Human Capital and Compensation Committee. With the appointment of Ms. Oates-Forney, Summit’s board now comprises nine members. Tamla Oates-Forney is a seasoned global human resources executive in large and complex organizations. She currently serves as Senior Vice President, Chief People Officer, at Waste Management, where she has primary responsibility for the human resources strategy including HR operations, employee relations, labor relations, HR information systems, compensation, benefits, culture & engagement, learning, leadership development and total talent management. The Board affirmatively determined that Ms. Oates-Forney is independent under the guidelines for director independence set forth in the Company's Corporate Governance Guidelines and under applicable New York Stock Exchange rules. Ms. Oates-Forney's term will expire at the Company's next annual meeting of stockholders. Ms. Oates-Forney was also appointed to serve on the Human Capital and Compensation Committee (the Compensation Committee") of the Board.