Prus was educated at Warsaw Technical University (1939). He served with the Polish forces in the Middle East and with the RAF during WWII and was twice awarded the Polish Cross of Valour. He studied at the University of Liverpool, taught and practised in London, and immigrated to Canada in 1952. After research with Buckminster Fuller at Princeton he set up practice in Canada. He became a fellow of the Royal Architectural Institute of Canada (RAIC) (1968), an academician of the Royal Canadian Academy of Arts (1972) and was named an honorary fellow of the American Institute of Architects (1977).
With his wife Maria Fisz Prus (Hon. FAIA 1977) and various associates he designed outstanding buildings that are characterized by an appropriate "ambience" - in his view the "ultimate objective" in architecture. His principal works include Rockland Shopping Centre, 1960 (Massey Medal), Savoie Apartment Bldg, 1962, Expo 67 Stadium (Citation 1967), Royal Canadian Air Force Memorial, Trenton (National Competition 1st prize 1969), Grande Théâtre de Québec and Conservatory of Music, Québec City (Competition 1st prize 1971), Canada/France Astronomical Observatory, Mauna Kea, Hawaii, 1977, International Airport, Barbados, 1979 and Palais des congrès, Montréal (Competition 1st prize 1979).