Chair in Administrative Law at various universities: Universidad de La Laguna (1983), Alcalá de Henares (1989) and since 1990 at the Universidad Carlos III Madrid.
Director, Institute Pascual Madoz on Planning, Urban Development and the Environment; Director of the Masters Programme on Planning and Urban Development Policy at the Universidad Carlos III Madrid.
Chancellor, Universidad Internacional Menéndez Pelayo 2005-2006: Honorary Chancellor in 2008.
Director-general of the Institute for Local Administration (Instituto de la Administración Local), 1983-1985.
Undersecretary for the Ministry for Territorial Administration (1985-1986) and the Ministry for Public Administrations (1986-1987).
President of the National Institute for Public Administrations (1987-1989).
In May 2011 he was named Senior Statesman by the prestigious British publication Chambers and Partners
Doctor Honoris Cause conferred by Universidad de Tucumán (Argentina), Universidad Católica de Tachira (Venezuela) and Universidad de Valparaiso (Chile)
Honorary Professor at the Faculty of Jurisprudence at Colegio Mayor Nuestra Señora del Rosario (Colombia), Universidad de Mendoza (Argentina), Universidad Nacional Mayor de San Marcos (Peru) and Universidad Externado de Colombia
Associate Professor of Administrative Law at Universidad Carlos III of Madrid, since 1992, where he imparts classes as part of the Official University Masters Programme for Access to the Legal Profession
More than 36 years of experience in academic research; has directed over 30 doctoral theses. He has authored numerous books and more than 300 specialised scientific studies and articles
He has participated in various competitive projects as part of the National Plan for R&D, as well as numerous research contracts of notable relevance and importance for companies and administrations