Jonathan MacKesson is a solutions-focused test security professional with over 15 years of experience protecting the integrity of high-stakes examination programs. Currently serving as Program Manager of Certification Security at Amazon Web Services (AWS), he oversees operational security and enforcement for a certification program with over 1 million active credentials across multiple testing modalities.

Prior to joining AWS, MacKesson managed test security for Graduate Management Admission Council (GMAC) and served as a Special Investigator for CFA Institute's Professional Conduct Program, where he pioneered innovative approaches to exam security, forensic analysis, and intellectual property enforcement. His expertise spans data forensics, threat detection, and process automation, having developed multiple solutions that significantly improved investigation efficiency and program integrity across global testing operations.

MacKesson brings an agile approach to exam security, combining technical expertise with strategic thinking to protect certification integrity while balancing operational efficiency.