After the June 1976 protests, he was co-founder of assurance to workers charged by the communist regime. He was one of the founders of the Workers' Defence Committee (KOR). He became Chief of Bureau of Intervention of the Committee for Social Self-defence KOR in 1977. In 1980, he was the founder of the Helsinki Committee in Poland. In the early 1980s, he was chief of Commission of Intervention and Law-abidingness of Solidarity. During martial law in Poland he established independent Radio Solidarity. In 1982, he was arrested and jailed by the communist regime until 1984.