Greg Stuart, whose successor as CEO of the IAB was announced yesterday, will join Rapt Inc.'s board of directors. Rapt offers software and advisory services for pricing and profitability management. 

Stuart leaves the IAB after five years, during which time the organization grew by 500 percent. Prior to the IAB, he worked at Cars.com, Flycast Network and Y&R's Wunderman. He is also the author of "What Sticks: Why Most Advertising Fails and How to Guarantee Yours Succeeds." 

Arthur Patterson, Rapt's chairman, says of the hire, "Greg Stuart's appointment to Rapt's board is a direct reflection of the company's remarkable achievements in digital media… The media industry will continue to be a growth engine for Rapt, making Greg a natural fit. I could not be more pleased to be adding his voice and vision to the leadership team."