Hulman Motorsports has announced Chief Marketing Officer C.J. O'Donnell will leave the company at the end of the year. He has held the position since 2013.

Hulman & Co. President and Chief Executive Officer Mark Miles says the company has made strides in recent years. "Our fan base has grown significantly, and we've seen improvement across all key marketing metrics. I am pleased with our progress and thankful to C.J. for his strong leadership. His passion for the sport, dedication to his team and tireless effort have produced meaningful results."

O'Donnell increased fan engagement by expanding social media exposure, adding more than 1 million followers and growing television viewership by 23-percent. 

"INDYCAR, fueled by our tremendous drivers, teams and sponsors, has experienced five years of steady growth," O'Donnell said. "In a short time, we've ignited new levels of interest in the IndyCar Series and the Indy 500. I am grateful to Mark Miles for this experience and very thankful to my entire team for their dedication and hard work. This project is not complete, but I am encouraged by our progress and proud of what we've accomplished together."

O'Donnell is now focusing on a smooth transition, which includes strategic planning with NBC Sports and helping develop a transition strategy for the marketing and communication departments.