Gordon Mangione, former Corporate Vice President in the Security Technology Unit at Microsoft, resigned its company 1 years ago, in November.
eWeek reported at that time this was a surprise.
Today he reappears in XenSource as Senior Vice President of Product Operations.
Update: The Register reports Mangione is the second former Microsoft executive to join XenSource.
Before him Frank Artale arrived at the company, occuping the role of Vice President of Business Development.
At Microsoft Artale was Vice President of the Windows Business Unit.