Master of Arts, University Warsaw, 1969. Doctor of Philosophy, University Warsaw, 1978.
Assistant University Katowice, 1969-1970. Researcher University Warsaw, 1970-1972, senior researcher, 1973-1977, assistant professor, since 1978, deputy director, 1981-1987. Consultant Research Center for Rehabilitation of Disabled Persons, Warszawa, 1973-1987.
Chairman Research Committee for the Sociology of Deviance, 1982-1984, 86—. Board Commission of Folk Law and Legal Pluralism, since 1984. Secretary Research Committee for the Sociology of Law, Warsaw, 1970-1982.
Married Ewa Pajestka-Kojder, December 20, 1980. 1 child, Kaja.