AAON, Inc. announced that its Board of Directors has increased the size of the Board from 7 to 8 members and appointed Caron A. Lawhorn as an independent director to fill the vacancy created by the increase in size. Ms. Lawhorn is a certified public accountant, and currently serves as Senior Vice President, Commercial, of ONE Gas, Inc., a standalone 100% regulated publicly traded natural gas utility. In her current role, Caron is responsible for commercial activities of ONE Gas’s three natural gas distribution utilities - Oklahoma Natural Gas, Kansas Gas Service and Texas Gas Service.