Keith Adams is a Virtual Machinist at Facebook. He is one of the initial designers and implementers of HHVM, the open source PHP JIT that runs Facebook's front-end. Through a series of mostly fortunate events, Keith became a founding member of The I-can't-believe-I'm-a-PHP-advocate Club. Before working at Facebook, Keith worked on VMware's virtual machine monitor. He holds a B.Sc. in Computer Science from Brown University.