Investigating unauthorized access to GitHub-owned repositories GitHub's Chief Information Security Officer, Alexis Wales, is leading an investigation into unauthorized access to GitHub-owned repositories. Wales, who has 20 years of experience defending networks for the Department of Defense and CISA, oversees a team focused on securing the GitHub platform and its community of over 150 million developers. Alexis Wales Alexis Wales is the Chief Information Security Officer of GitHub. She leads a team of security experts focused on safeguarding the GitHub platform, products and the open source community, empowering more than 150 million developers worldwide to build and deploy software securely on GitHub. Alexis has 20 years of experience defending critical national and private sector networks, spanning positions with the Department of Defense and the Department of Homeland Security’s Cybersecurity and Infrastructure Security Agency CISA . This experience sparked her passion for collaboration between the public and private sectors to solve the hardest security challenges that threaten the technology we use every day.