Michiel is an information security expert, researcher, hacker, and developer. He has been finding critical software vulnerabilities in technology for over 10 years. Prior to founding HackerOne, Michiel co-founded a successful pentesting company that worked on projects for trusted organizations, from government institutions to top technology companies, including Twitter, Facebook, Evernote, and Airbnb, among others. Michiel regularly presents on vulnerability disclosure and security research projects regarding security management, privacy, and web application infrastructure. Michiel graduated with a B.S. in Computer Science from Hanze University Groningen.