David currently serves as the Ministerial Secretary, Director of Aboriginal and Torres Strait Islander Ministries, and local church pastor of the South Australian Conference of Seventh-day Adventist. Before these roles, David served as principal of Mamarapha College (2013-19), a First Nations vocational college, and in various ministry roles, including chaplaincy and local church ministry.

His academic research focuses on the Hebrew Bible, especially the origins of resurrection, the strategic significance of vocative-style invocations, and the function and interplay of literary devices such as paronomasia in the biblical text. His dissertation (2025) was titled "An Investigation of the Resurrection Motif through the Invocations of YHWH and the Paronomasia of Baalim in Isaiah 26:7-19."