Antonio “Johnny” Martinelli


Director of Information Security Training

Johnny Christmas is a predominant personality in the Information Security community, most well-known for his work on the TSA Master Key leaks between 2014 and 2018 and the Venmo public feed scraping exposures in 2018. Currently a trainer with the famous Grimm Security Engineering group, he has formerly partnered with Australian firm 'Kasada' to defend against the automated abuse of web infrastructure and was the lead consultant on Uptake's Industrial Cybersecurity Platform. Prior to this, he spent many years in the field as a penetration tester, focusing heavily on both IT and physical security of financial and medical facilities, Security Engineer for a global Fortune 500 retail corporation, and Mainframe auditor and Systems Engineer for several IT asset recovery firms. He can most easily be reached via Twitter at @J0hnnyXm4s.