Mounstephen was
ordained in the
Church of England: made a
deacon at
Petertide 1988 (3 July) at
St Mary's Church, Amersham and ordained a
priest the following Petertide (2 July 1989) at
Christ Church Cathedral, Oxford – both times by
Simon Burrows,
Bishop of Buckingham. From 1988 to 1992, he served his
curacy at
St James Church, Gerrards Cross with St James' Church,
Fulmer in the
Diocese of Oxford. He was a made a
minor canon of the
Cathedral of the Holy Trinity, Gibraltar, in August 2012, and he was collated as a "canon without stall" during a service at
St Matthew's Church, Westminster, in October 2017. On 1 July 2012, it was announced that Mounstephen would be the next executive leader of the
Church Mission Society (CMS) in succession to
Tim Dakin. He took up the post on 13 October 2012 during a commissioning service at
St Aldate's Church, Oxford.
Episcopal ministry On 30 August 2018, it was announced that Mounstephen would be the next
Bishop of Truro, the
diocesan bishop of the
Diocese of Truro. He officially became bishop-elect upon the
confirmation – on 20 November at
St-Mary-le-Bow – of his
election; he was consecrated a bishop on 30 November at
St Paul's Cathedral by
Justin Welby,
Archbishop of Canterbury, and was welcomed at
Truro Cathedral on 12 January 2019. In July 2023, it was announced that Mounstephen would be the next
Bishop of Winchester, the diocesan bishop of the
Diocese of Winchester, and that he was to leave his post at Truro in autumn 2023. He was formally
translated from Truro to Winchester at the confirmation of his election on 10 October at
St Mary-le-Bow. The Bishop of Winchester is one of five Church of England bishops who sit
ex officio among the 26
Lords Spiritual in the
House of Lords. Mounstephen joined the House of Lords on 15 November 2023. He made his
maiden speech on 11 January 2024 during a debate on the impact of climate change on developing nations.
Views Mounstephen believes "passionately in the doctrine of marriage as we have received it" (i.e. one man and one woman for life). In February 2023, he voted for the introduction of blessings for those in same-sex relationships. ==Personal life==