Formerly, Greg was the Chief Technical Officer for ISKME. Previous to that, Greg was a Senior Community Architect at Red Hat. He was the founder and first chairman of the Fedora Project Board, the governance body for the Fedora Project, an open source software project which now has over 13,000 volunteer contributors as of January 2009. He was also the founder and former chair of the Fedora Engineering Steering Committee, and the founder and former chair of the Fedora Ambassadors Steering Committee. He currently serves on the oversight board for Sugar Labs, the organization that drives development of the Sugar educational platform. He was with Red Hat from 2001 - 2010. He blogs at http://gregdek.livejournal.com, and can be reached at greg at iskme dot org.
Here's a great list of stuff that Greg has learned over the years.