Nelson has been upped from a strategic planning role at Turner and in his new role will oversee Turner channels and businesses across Southeast Asia-Pac as well as Japan and South Korea.
Regional bosses Tom Perry, Ron Lee and Robi Stanton will report into Nelson under the new structure.
Nelson will report to Ricky Ow, who joined Turner at the start of the year after leaving Sony.
Ow said: “With his experience of the media business in Asia Pacific, Phil’s role at the heart of Turner’s commercial operations will undoubtedly put us in a stronger position for future growth.”
Nelson joined Turner in 2010. Prior to that he was managing director of AOL Asia, based in India and prior to that was a commander in the US Navy.