Gatorade North America has named Sarah Robb O’Hagan as its new president and global chief marketing officer for sports nutrition. She succeeds Rich Beck, who will be senior vice president of global supply chain operations at PepsiCo, Gatorade’s parent.

Robb O’Hagan joined Gatorade in 2008 as chief marketing officer, spearheading the company’s launch of G Series, a three-product sales proposition for before, during and after workouts. Gatorade now offers a G Series for elite athletes and competitive high school athletes. The company is launching a G Series for fitness athletes in the spring, including energy bar bites.

“These innovations, along with breakthrough marketing communications, have contributed to outstanding sales growth and improved perceptions of the Gatorade brand,” Massimo d’Amore, CEO of PepsiCo Beverages America, said in a statement. “With that kind of momentum, Sarah is well poised to tackle the global sports nutrition marketplace in 2011 and beyond.”

The last two years have been tumultuous for Gatorade, which has tried to reinvent itself as a “nutrition drink” and has struggled with its dramatic rebranding as “G.”