Badjadja served as the Director of the Archive Department of Constantine from 1974–1991, and then Director of the National Library of Algeria from 1991-1992. He was the Director General of the National Archives of Algeria (Archives Nationales d'Algerie) from 1992-2001. He currently serves as the Consulting Archivist at the Information and Research Center, at the Presidency in Abu Dhabi, United Arab Emirates. He was also the director of the Archives de Wilaya de Constantine in Constantine, Algeria.
From November 1986 to March 1987, he was placed under town arrest restrictions but no official reasons were ever given.
International biographical directory of national archivists, documentalists, and librarians / edited by Jeffrey M. White, Todd J Kosmerick, Laurie Scrivener ; compiled by Susan Houck. 2nd ed. Lanham, Md. : Scarecrow Press, 2000.
International Counsel of Archives member directory: