Mark Geeslin is a Senior Principal Software Engineer and Director of Application Security at Asurion. He has been working in the software development and security industries for over 25 years in many diverse environments, ranging from high-tech security start-ups to Fortune 100 companies. In recent years he has directed the application security programs at leading software technology firms in Silicon Valley. Besides his extensive experience as a software engineer, Mark's expertise includes large-scale application security assessments, penetration testing, threat modeling & architectural risk analysis, static & dynamic software security analysis, secure code review, and security research. Mark has earned advanced degrees in both computer science and theology, and currently holds the GWAPT, GMOB, GSSP-Java, GSSP-.NET, and GSEC certifications.