He worked as an assistant minister in parishes in the Diocese of Sydney at Lalor Park and North Sydney, before becoming rector of St Andrew's Anglican Church, Roseville, a position he held for 18 years.
[1][3] In November 2009 Calder became rector of Noosa Anglican Church in the Diocese of Brisbane, a role which he held until elected as Bishop of Bathurst in 2019.
[4] Calder was consecrated as bishop by Archbishop of Sydney Glenn Davies on 21 November 2019 in St Andrew's Cathedral, Sydney, and installed as bishop on 23 November 2019 in All Saints' Cathedral, Bathurst.
[1] Calder has said his goal as bishop is to "share the good news of Jesus across the diocese".
[1] In 2023 Bishop Calder will be speaking at the Seaforth Anglican Weekend Away (18-20th August) on the book of Jonah.