John Hales has been working in the IT industry for more than 16 years, and with VMware products for 12+ years. He has earned many vendor certifications over the years, including EMC, VMware, Microsoft, Novell, and CompTIA. His VMware certifications include: VCP 3, 4, and 5; VCAP; and VCI. He has taught and developed courses (and consulted on many of these technologies) for both public clients and Fortune 500 companies worldwide. Today, he teaches a variety of classes, specializing in VMware's vSphere 4 and 5, SRM, and View. He is the president of Hales Technologies, a company specializing in courseware development, training, and solution-oriented consulting.