Ballmer's leaving: Who's next? Summary: Steve Ballmer said he's leaving his CEO position Microsoft in a year, but there's no real frontrunner for his succession. Here's our top 10 contenders. By Andy Smith | August 23, 2013 -- 16:33 GMT (09:33 PDT) Previous | Next Image 3 of 10 Tami Reller Tami Reller is a 12-year veteran of Microsoft and is Executive VP of Marketing for the Windows team. Topic: Microsoft Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.