Alton Crossley

Senior Application Security Engineer,
GuidePoint Security

Alton Crossley is a Senior Application Security Engineer with over 20 years of experience spanning software engineering, architecture, and security. He started coding at just eight years old and built his career from hands-on support and network engineering to systems administration, eventually finding his home in software development and, later, application security. Today, Alton partners with businesses to strengthen their AppSec programs by helping them operationalize tools, empower developers, and foster a culture of secure coding through gamification, training, and mentorship. He brings deep expertise in modern technologies to design secure solutions, perform reviews and threat modeling, and reduce risk across complex environments.