The document advertises the Open Security Summit 2019 conference happening in London from June 3-7. It will bring together security experts, developers, users, government agencies and vendors to collaborate on solving hard security problems. Participants will have the opportunity to engage in working sessions from 8am to 2am focused on 12 tracks, including outcomes from last year's summit. Individuals can purchase tickets, seek sponsorship, or have their company sponsor the event. The goal is to create a collaborative environment for maximum productivity and synergies between attendees.