Daniel Somerfield has been over 15 years experience developing software for retail sales, corporate communications, enterprise development, and IT security and compliance. In 1997 he co-founded ISNetworks, a company specializing in digital signature and encryption technologies. While at ISNetworks, Daniel and business partner Jess Garms co-wrote "Professional Java Security". After ISNetworks, Daniel worked for a number of companies on the West Coast writing software, training developers in application security, and generally trying to convince developers that security matters. Today he lives in San Francisco and works as a consultant and secure software delivery evangelist at ThoughtWorks where he focuses on software delivery that brings business value efficiently and securely.