After nearly 5 years with the company, Engineering Director Mark Lucovsky

Before Google, Lucovsky worked at DEC and then Microsoft

A famous anecdote recounted on TechCrunch:
But Lucovsky may be best known for the role he played in a complete and utter meltdown that Microsoft CEO Steve Ballmer
once had. As the NT architect, Lucovsky was clearly pretty vital to Microsoft, so when he went in for a meeting with Ballmer in 2004 to let him know he was leaving, you can be sure the CEO was a bit on edge.
“Just tell me it’s not Google,” Ballmer reportedly said
according to court documents (for a case surrounding another Google ex-Microsoft hire). When Lucovsky said it was Google, Ballmer allegedly picked up a chair and threw it across the room.
Kind of funny– my parents have a google voice number before I do