Starwood Hotels & Resorts has named Thomas B. Mangas chief executive officer, effective 31 December, following the resignation of Adam Aron, who is leaving the company to become CEO and president of AMC Entertainment Holdings.

Mangas is currently executive vice president and chief financial officer – a post he has held since September 2014 – and is responsible for the global accounting, tax, treasury, strategic planning, corporate development, risk management, investor relations and supply chain functions. Prior to joining Starwood, he served as executive vice president and chief executive officer of Armstrong Floor Products.

Alan M. Schnaid, currently Starwood’s senior vice president, corporate controller and principal accounting officer, will be appointed chief financial officer. Robyn Arnell, currently vice president, finance and accounting services, will assume the role of corporate controller.

Starwood said it continues to expect its previously announced acquisition by Marriott International to close by mid-year 2016.

“On behalf of Starwood’s board of directors, I would like to thank Adam for stepping in to lead our company during a pivotal time in Starwood’s history,” said Bruce W. Duncan, chair of the board.

“He accomplished much during his tenure as CEO, and contributed in countless ways as a member of our board for nearly a decade. He leaves this company in excellent hands with Tom, a valued leader on our team who was instrumental in our review of our strategic initiatives and will continue to oversee the completion of our combination with Marriott.”