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Glen E. Clarke (MCSE/MCSD/MCDBA/MCT/MCTS/CEH/Security+/Network+/A+) is an independent trainer and consultant, focusing on network security and security auditing services. Glen spends most of his time delivering certified courses on A+, Network+, Windows Server, SQL Server, Exchange Server, Visual Basic .NET, and ASP.NET. Glen also teaches a number of security related courses covering topics such as ethical hacking and countermeasures, vulnerability testing, firewall design, and packet analysis. Glen is an experienced author and technical editor who has worked on fourteen certification books. Glen designed and coauthored the award nominated A+ Certifi cation Bible and has worked on certifi cation titles involving topics such as Windows certifi cation, CIW certifi cation, Network+ certifi cation, and Security+ certifi cation. Glen is also author of The Network+ Certifi cation Study Guide, 4th Edition.

Edward Tetz graduated in 1990 from Saint Lawrence College in Cornwall, Ontario with a degree in Business Administration. He spent a short time in computer sales, which eventually led to a computer support position. After several years of providing system and LAN support to small and large organizations, in 1994 he added training to his repertoire.
Some of the certifications that he holds include A+, ITIL Foundations Certificate in IT Service Management (IT Infrastructure Library), Microsoft Certified Trainer (MCT), Microsoft Certifi ed Systems Engineer (MCSE), Microsoft Certified Database Administrator (MCDBA), and Chauncey Group's Certified Technical Trainer (CTT). Since 2002, he has been a full-time consultant for a value added reseller in Halifax, Nova Scotia. Over his years of work experience, he has supported Apple Macintosh, IBM OS/2, Linux, Novell NetWare, and all Microsoft operating systems from MS-DOS to Windows 2008, as well as hardware from most of the major vendors.