Mark Geeslin is currently senior principal software engineer in application security at Asurion. Mark has been working in the software development and security industries for over 25 years in diverse environments ranging from high-tech security start-ups to Fortune 100 companies. In recent years he has directed AppSec programs for various leading technology firms in Silicon Valley. Besides his extensive experience as an engineer, Mark's expertise includes large-scale security assessments, penetration testing, threat modeling, static & dynamic software security analysis, and application security research. Mark has degrees in computer science and theology, and holds a number of industry-recognized technical certifications.