[5] On December 26, 2006, by the decision of the Holy Synod of the Russian Orthodox Church, Archimandrite Sergius was appointed Bishop of Ussuriysk, vicar of the Diocese of Vladivostok.

[5] On July 12, 2007, Bishop Sergius, who arrived in Singapore at the invitation of Russian Orthodox people, celebrated the liturgy at the Armenian Church of Gregory the Illuminator.

[7] On March 31, 2009, at the first 2009 session of the Holy Synod, chaired by newly-enthroned Patriarch Kirill, he was appointed Bishop of Solnechnogorsk, vicar of the Moscow (city) diocese.

[11] On December 26, 2012, by the decision of the Holy Synod of the ROC, Bishop Sergius was entrusted with the archpastoral care of the Michael the Archangel parish in Kuala Lumpur.

[13] On November 20, 2016 at the Cathedral of Christ the Saviour in Moscow, during the 70th anniversary of Patriarch Kirill, bishop Sergius was elevated to the rank of Archbishop "for the diligent service of the Church of God".

[20] On July 23, 2019, he was relieved of the post of head of the Administrative Secretariat of the Moscow Patriarchate, expressing gratitude for the conscientious and effective performance of official duties.