Complex sentence: Mark Shavlik left his role as CEO when Shavlik Technologies was acquired by VMware in May 2011, and held the position of Vice President and General Manager at VMware until March 2013.
Split into simpler sentences: Mark Shavlik left his position as CEO when Shavlik Technologies was acquired by VMware in May 2011. Mark was a VP and General Manager at VMware until March 2013.