Michael Cullum is a backend software engineer, working particularly with PHP, and has been for about a decade. He currently works at SamKnows as a senior software engineer & architect doing data intelligence, storage and processing of internet measurement data at huge scale. He is also a manager & core developer at phpBB where he has been a contributor for over half a decade and he recently joined the Symfony Core Team as Security Lead. He is actively involved in the PHP FIG previously running the administration of it as the PHP FIG Secretary for 2 years and editor of PSR-12; he now sits on the Core Committee, the steering group of the FIG and is the editor of two security PSRs (PSR-9 and PSR-10).