Simon is a Principal Open Web Engineer at Bocoup, where he works on web standards and web platform conformance testing for Bocoup's clients.
He joined Bocoup in 2017 after 10 years at Opera Software, where he worked on automated browser testing and web standards. Simon was one of the early collaborators on the web-platform-tests project, and has contributed numerous test material to the project.
Additionally, Simon is editor of the HTML standard and Quirks Mode standard at the WHATWG.