Tadeusz Kondrusiewicz was born to a Polish family on January 3, 1946, at the town of Odelsk near Grodno in Byelorussia. He graduated from the Leningrad Polytechnic Institute and worked as an engineer in Vilnius for a few years.
After graduation from the Kaunas Seminary in May 1981, he was ordained priest. While serving in Vilnius, he studied at the extra-mural department of theology at Kaunas Seminary. In 1988, he moved to Byelorussia, his native land. On May 10, 1989, the Vatican appointed him bishop for the Minsk episcopacy, and on October 20 of the same year he was consecrated bishop.
On April 13, 1991, he was elevated to the rank of archbishop and appointed apostolic administrator for the Latin-rite Catholics in the European part of Russia. On March 2, 1999, he was elected chairman of the Conference of Catholic Bishops in Russia.
On February 11, 2002, the Pope John Paul II appointed him head of the Archdiocese of the Mother of God based in Moscow and metropolitan of the four newly-established Roman Catholic dioceses in Russia.
Since September 21, 2007, he is Metropolitan of Minsk-Mogilev.
Archbishop Kondrusiewicz is a member of the Healthcare Council, a member of the Special Council for Europe under the General Secretariat of the Roman Catholic Bishops’ Synod, a member of the Presidential Council for Cooperation with Religious Associations, and co-chair of the Christian Inter-Confessional Advisory Committee.
He is a doctor honoris causa of several universities abroad. He has a good command of the Byuelorussian, Polish, Lithuanian, English and Italian languages. He is actively engaged in such sports as jogging, football, skiing and hockey.