Bob John Hassan Koroma (born 17 November 1971) is a Sierra Leonean Roman Catholic prelate who is the bishop of the Roman Catholic Diocese of Makeni in Sierra Leone since 11 February 2023. Before that, from 25 April 1999 until he was appointed bishop, he was a priest of the same Catholic diocese. Pope Francis appointed him bishop. He was consecrated on 13 May 2023 and was installed at Makeni on 14 May 2023.
Bob John Hassan Koroma was born on 17 November 1971 in Kamabai, in Makueni Diocese, in the Northern Province of Sierra Leone. He studied philosophy and Theology at seminary. He studied at the Pontifical Biblical Institute in Rome, graduating with a Licentiate in sacred scripture. He also holds a Doctorate in biblical theology from the Pontifical Urban University, also in Rome, Italy.
On 25 April 1999, he was ordained a priest for the Catholic Diocese of Makeni by Giorgio Biguzzi, Bishop of Makeni. He served as priest until 11 February 2023.
While a priest, he served in various roles and locations including:
On 11 February 2023, the Pope Francis appointed the Reverend Father Monsignor Bob John Hassan Koroma, of the clergy of Makeni, previously the diocesan Vicar General and administrator of the Diocesan Cathedral of Our Lady of Fatima, as the new bishop of the diocese of Makeni. He took over from Bishop who worked as the Apostolic Administrator of the diocese since 11 April 2012.
Monsignor Bob John Hassan Koroma was consecrated bishop on 13 May 2023, at Makeni, by Walter Erbì, Titular Archbishop of Nepeta assisted by Edward Tamba Charles, Archbishop of Freetown and , Titular Bishop of Gadiaufala and Apostolic Administrator Emeritus of Makeni. Bishop Koroma was installed at Makueni the next day, 14 May 2023.