Based in Japan, Zachary Mathis is a principal security engineer at Kobe Digital Labo's Proactive Defense. While working at Carnegie Mellon CyLab Japan, he created the security division in 2006, which has grown to the largest security services company in western Japan. Proactive Defense provides services such as web application, network and smartphone application security penetration testing, incident handling, forensics, and phishing assessments to some of the largest companies in Japan. He is one of the authors of JSSEC's Android Application Secure Coding Guidebook, and an active member of SECCON, Japan's largest CTF organization. He regularly organizes security events throughout the year including zero day bug bounty events for medical and IoT hacking. He is currently the local instructor for SEC504 in Japan and holds numerous GIAC certifications.