Calvin was a Senior Fellow responsible for Education Policy at Policy Exchange, and working on the History Matters project. Calvin is a former Director and Governor of Michaela Community School, and a former Assistant Principal at a state school in North London. He is a regular contributor to The Telegraph, Daily Mail, TalkRadio, and Good Morning Britain (GMB), among other mainstream media outlets. Calvin also consults for the Department for Education in their National Centre for Computing Education as a Subject Matter Expert.