Andrew has worked in IT for more years than he cares to mention, well since 1986 and has been working with Citrix technologies since Metaframe 1.8 in 1999. He not only has skills and certifications in Citrix, but he also teaches Linux, Citrix, Novell, and Microsoft official courses and supports many of these products. Being well versed and certified in Linux , Andrew's interest and skills in security and remote access made this an ideal book for him to write, combining Linux and Citrix in one product and book. Andrew currently works for QA Ltd (http://www.qa.com), the largest Citrix Authorized Learning Centre in the UK as a Certified Citrix Instructor and Principal Technologist. You may well find Andrew teaching across the UK at one of their many training centers.