 Between 1996 and 1997, he was a Visiting Fellow at the University of Cambridge.From 1995, Kochanowski was a member of the District Council of Legal Advisers in Warsaw and, from 1980 to 1991, he was a member of the Independent Self-governing Trade Union "Solidarity".Between 1989 and 2003, he was a founder member, secretary and honorary member of the Rotary Club of Warsaw.