Reijer Passchier studied Law at Leiden University. During his master European Law he took part in the Talent Program of the Graduate School of Legal Studies. Reijer was also Student Ambassador for Leiden Law School and worked as a research assistant for Prof. W. Voermans.
On the 1st of September 2012, Reijer started his PhD at the department of Public Law. His thesis concerns the phenomenon of ‘covert constitution building’, i.e. regulating a constitutional issue while bypassing the prescribed constitutional amendment procedure. This project studies whether and under which conditions rigid constitutions sometimes cause covert constitutions.