Professor Zellick served as Electoral Commissioner (2001–06) and was for nearly 20 years an academic lawyer at
QMUL, where he was Head of the Department of Law, Dean of the Faculty of Laws, Professor of Public Law and Drapers' Professor of Law. He was also Chairman of the Committee of Heads of UK Law Schools and a member of the Lord Chancellor's Committee on Legal Education. He was Editor of
Public Law and founding Editor of European Human Rights Reports, as well as a member of the Data Protection Tribunal, the Criminal Injuries Compensation Appeals Panel, the
Competition Appeal Tribunal, the
Lord Chancellor's Advisory Committee and a member of the Legal Aid and the Criminal Justice Council. Also appointed a
magistrate, he is a qualified
barrister and
Master of the Bench of the
Middle Temple. Zellick is an Honorary Fellow of Gonville and Caius College, Cambridge, a Fellow of the Institute for Advanced Legal Studies and an Academician of the Academy of Social Sciences. An Emeritus Professor of Law of the University of London, Visiting Professor of Law of Queen Mary and Honorary Professor of Law of the
University of Birmingham, he has also been elected a Fellow of the
Royal Society of Arts, an Honorary Fellow of the
Royal Academy of Music and a Companion of the
Chartered Management Institute. Zellick was, in 2010, a Distinguished Visiting Fellow to the New Zealand Law Foundation. ==Honours==