Antoni Dziemianko was born on January 1, 1960 in the village of Zabroddze of the parish of Dzeraunaja, the archdiocese of Minsk-Mohilev.

After finishing school he got from state authorities the permission to entry the seminary of Riga. His priestly formation took place under the spiritual direction of Doctor of Theology Prelate Vatslav Piantkousky, Vicar General of the diocese of Pinsk at that time.

On October 28, 1980, Antoni Dziemianko was ordained priest.

Till April 26, 1985 he had no permission from the state authorities for priestly service and worked as sacristan and organist.

In 1982-1984 he was called to military service, which he did beyond the polar circle in the region of Murmansk.

From 1984 till 1998 he worked as dean in Navagrudak.

In 1992 he began his studies at the Institute of Family of the Catholic Theological Academy in Warsaw, which he graduated from in 1996 taking his degree of Master of Theology.

On July 4, 1998 Antoni Dziemianko was nominated Auxiliary Bishop of the diocese of Grodno by the decree of the Holy Father John Paul II.

The consecration carried out by Kazimierz Cardinal Świątek took place on the 29th of September 1998.

From 1998 till 2004 Bishop Antoni Dziemianko was Vicar General of the diocese, dean of the cathedral parish and rector of the Major Seminary in Grodno.

He was elected Secretary General of the Conference of Catholic Bishops in Belarus, head of the Councils for Liturgy, Family and Charity Activity.

On December 14, 2004 Pope John Paul II appointed His Excellence Antoni Dziemianko, who performed the functions of the Auxiliary Bishop of the diocese of Grodno, to the post of Auxiliary Bishop of the archdiocese of Minsk-Mohilev.

On the 14th of June 2006 the Holy Father Benedict XVI nominated His Excellence Antoni Dziemianko as Apostolic Administrator sede vacante et ad nutum Sanctae Sedis of Minsk-Mohilev.