Valve's former Steam boss was hired by Microsoft to lead its PC gaming division in August 2013. Now he's gone after just six months.

Jason Holtman, Microsoft's director of business development for the PC gaming and entertainment division, has left the company, according to his LinkedIn page. Neowin noticed he had left the Redmond-based company in January, and didn't offer any indication where he may be going.

Read: Microsoft grabs Valve's former Steam boss to lead PC gaming division

"We can confirm that Jason has left Microsoft and we're grateful for his time at the company," Microsoft said in a statement. "We wish him the best in his future endeavours."

Holtman was going to do big things at Microsoft, many speculated. His hiring signalled that Microsoft wanted to shake things up in the PC gaming industry, after its PC gaming division became overshadowed by the Xbox 360 and Xbox One.

Microsoft hasn't named a successor to Holtman.