Member faculty Jagiellonian University, since 1949, professor business and commercial law, 1967, chairman department private business law, since 1972. Professor School Commerce, Cracow, Katowice, Poland, 1949-1952, 63-68. Attorney, legal counsel Attorney' General’ s Office, Cracow, since 1951.
Visiting professor Ruhr University, Bochum, Germany, 1983-1984, 89, Universität Würzburg, Germany, 1987, University Innsbruck, Austria, 1993. Book public, managing director Institute Business Law and Foreign Investment Ltd., Cracow, 1991. Judge Arbitration Court, National Business Chamber, Warsaw, Poland, 1976.
- Author: 27 books, 12 monographs, 15 handbooks, including (monographs) Supreme Court Functions, 1965, Binding Court Interpretation, 1971, Gesellschaeften mit Ausländischer Beteiligung, 1992, (outline) Business Law, 1981-1982. Co-author, editor: Law of Contracts in Business, 1993. Contributor over 150 articles to professional journals.
Member legislation council Office Minister of Justice, Warsaw, 1984-1993. Member codification committee Polish United Nations Educational Committee, Warsaw, 1989-1993, member social science committee, 1992. Member Polish Academy of Sciences (law committee 1978-1993), Rotary (founder, president, honorary president Cracow 1991).