[2][4] He was ordained as a subdeacon on 29 June 1957 by the auxiliary bishop of Warsaw at the time, Zygmunt Choromański [pl].

Kędziora was ordained to be a presbyter on 3 August 1958 at St. John's Archcathedral, Warsaw, again by Wyszyński.

He then obtained a doctorate in theology from the same university in 1971 with his dissertation titled Science of Saint Bernard of Clairvaux on the mystical knowledge of God.

[2] From 1982 to 1987, he was the parson of the Parish of All Saints, based in Warsaw, as well as the dean of the deanery of Warszawa-Śródmieście.

Cardinal Józef Glemp consecrated him with the assistance of fellow auxiliary bishops Władysław Miziołek [pl] and Kazimierz Romaniuk.

In the Roman curia, he was the chairman of the Department of General Administration and the Faculty of Catholic Science.

[13] By the decision of the former President of the Republic of Poland, Lech Kaczyński on 17 July 2008, Kędziora was awarded the Officer's Cross class of the Order of Polonia Restituta.