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In 1992, Bill Sempf was working as a systems administrator for The Ohio·State University under Sandy Wambold, and formalized his career-long association with internetworking. While working for one of the first ISPs in Columbus in 1995, he built the second major web-based shopping center, Americash Mall, using Cold Fusion and Oracle. Bill's focus started to turn to security around the turn of the century. Internet-driven viruses were becoming the norm by this time, and applications were susceptible to attack like never before. In 2003, Bill wrote the Security and Deployment chapters of the often-referenced Professional ASP.NET Web Services for Wrox, and began his career in pen testing and threat modeling with a web services analysis for the Ohio Department of Health.
Currently, Bill is working as a security-minded software architect specializing in the Microsoft space. He has recently designed a global architecture for a telecommunications web portal, modeled threats for a global travel provider, and provided identity policy and governance for the State of Ohio. Additionally, he is actively publishing, his latest being Windows 8 Application Development with HTML 5 For Dummies and C# 5.0 All-in-one For Dummies.
Bill is an organizer for the Columbus chapter of OWASP, and the project leader for the OWASP .NET Project. He is one of the editors for the .NET Security Cheat Sheet and the Security Testing Cheat Sheet. He can be reached at bill.sempf [at] owasp.org and at www.sempf.net.