Kolisar began writing software at the age of 10. His first computer was a Commodore Vic-20 with a whopping 3K or RAM. After high school and attending a technical school he spent nearly 20 years as a software engineer writing CAM tools on UNIX and Windows, machine control and CRM software in C/C++, Java, JavaScript, VBScript, etc., and occasionally hand optimizing assembly graphics code for performance. He is currently working in the security department of a medium-sized company where he does security research, vulnerability and risk assessment, incident response and reverse engineering malware.