He completed his studies in 1870, attaining a magister degree in theology.

[3] In April the same year, Zwierowicz was appointed a professor at the seminary in Vilnius,[3] where he taught the history of the Catholic Church as well as theology and exegesis.

[3] In 1887, Zwierowicz was made canon of the cathedral in Vilnius; he was made administrator of the Diocese in Vilnius in 1897,[5] succeeding Ludwik Zdanowicz.

In April that year, he was appointed Bishop of Vilnius; he was consecrated in November in St. Petersburg by Mečislovas Leonardas Paliulionis, Bishop of Samogitia.

[7] In September, he was appointed by Pope Leo XIII as Bishop of Sandomierz.