By Dave Sebastian

PepsiCo Inc. is tapping World Trade Organization Director-General Roberto Azevêdo as its corporate affairs chief, effective Sept. 1, a year short of his second term's end date at the organization.

Mr. Azevêdo would take on a newly created role that oversees public policy, government affairs and communications, PepsiCo said Wednesday, in a move that will boost its efforts in engaging with governments, regulators, international organizations and non-governmental bodies.

Mr. Azevêdo in May said he would step down as director-general on Aug. 31. He has been director-general since September 2013 and is the sixth person to hold the title.

He previously served as Brazil's ambassador to the WTO and vice minister for economic and technological affairs in Brazil, a position through which he negotiated on trade at the Doha Round and the Mercosur negotiations. He was also the chief litigator in WTO disputes for Brazil.

"Over the course of his career, Roberto has built an extensive, diverse network across the globe and is widely recognized by world players in both developed and developing economies," PepsiCo Chairman and Chief Executive Ramon Laguarta said. "His geopolitical insights will be invaluable to our discussions and decision-making in an ever-changing world, and we are proud to have him lead our engagement with key global stakeholders."

PepsiCo also tapped Jim Andrew as chief sustainability officer, effective Sept. 1, in addition to his current role as executive vice president for the company's "Beyond the Bottle" sustainability initiative. He will succeed Simon Lowden, who is retiring after 24 years at the company.

Write to Dave Sebastian at dave.sebastian@wsj.com