Duguid began as an electrical engineer in Glasgow (1981–1983) and then served as a missionary electrical engineer at ELWA Christian Radio Station and Hospital in Monrovia, Liberia (1983–1985). Current research areas include
Judges, the biblical theology of worship, and preaching Christ from diverse Old Testament genres. He has taken roles in Bible translation oversight, such as the
Holman Christian Standard Bible, and contributed to various study Bibles. In fall 2019, he became editor of
The Quarterly, the adult Bible-study curriculum of the ARP Church, overseeing content covering the entire Bible over seven years. ==Pastoral ministry==