Howell was born in Brisbane in 1958 and educated at St James College, Brisbane. After graduating from high school, he joined Queensland Rail and worked as a clerk in the chief engineer's office. He entered Pius XII Regional Seminary (now Holy Spirit Seminary, Brisbane) in 1977.[5]
He returned to Australia in 1997 and served as Secretary to Archbishop John Bathersby until 2001, while also serving as a priest and then dean at St Stephen's Cathedral, Brisbane. He also served as the vice rector of the Holy Spirit Seminary, Brisbane between 2002 and 2008. He became the administrator of St Mary's Parish, South Brisbane in 2008 and Parish Priest at Burleigh Heads in 2013.[7]
Episcopacy
On 28 March 2017, Pope Francis appointed Howell as auxiliary bishop of the Roman Catholic Archdiocese of Brisbane following the resignation of Monsignor Joseph John Oudeman OFMCap.[8] He was given the titular see of Thamugadi and was consecrated on 14 June 2017 by Archbishop Mark Coleridge. On 1 February 2021, he was appointed Vicar General of the Archdiocese of Brisbane.[9]