Microsoft executive Joanne Bradford (Corporate Vice President, chief Media Officer, MSN), is leaving Microsoft to join Spot Runner Inc.

Headquartered in Los Angeles, Spot Runner develops technology solutions that revolutionize the way advertising is created, targeted, bought and sold. The company was founded on the idea that the Internet could help make television advertising more affordable and accessible for local businesses and put them on a level playing field with larger competitors. Today, Spot Runner focuses on automating many of the more inefficient aspects of the advertising process and creating turnkey ways for businesses of all sizes to access high-quality creative and expert media planning and buying services.

At Microsoft Joanne Bradford was most recently the company's chief media officer, overseeing the MSN Media Network. Prior to that, she ran the company's online advertising initiatives. Greg Nelson, a 12-year Microsoft veteran and previous general manager of MSN.com International, will lead the MSN team on an interim basis.

This is not the only change at Microsoft. Steve Berkowitz, the head of Micosoft's Online Services Group, will be leaving later this year.