Thomas Uphill is an RHCA who has been using Puppet since version 0.24. He has been a system administrator for nearly 20 years, more than 10 of which have been with Red Hat Linux and its derivatives. He wrote Mastering Puppet, Packt Publishing, a book on deploying Puppet in an Enterprise setting. He enjoys teaching others how to use Puppet to automate as much as possible. He runs the Seattle Puppet Users Group (PUGS) and volunteers with LOPSA and SASAG. You can find him at http://ramblings.narrabilis.com.