Bunyan Edmund Vijayam (1933–2019) was an Indian geologist and Christian lay leader who made significant contributions to both scientific research and indigenous missionary work in India. Educated at Andhra University in Waltair, Vijayam began his geological research in the mid-1950s, focusing on the Kurnool district. During his time at Andhra University, he collaborated with a team of researchers to develop innovative techniques in nuclear chemistry and geology. Notably, the team developed a new technique for the ion-exchange separation of uranium from thorium and rare earths, alongside a simplified chromatographic method for estimating small quantities of thorium. His scientific papers, published over more than three decades, established him as a respected figure in Indian geology. In addition to his scientific career, Vijayam was a dedicated Christian witness and leader who inspired many through his ministry. He was highly active in the Christian Businessmen's Committee, speaking at their fifth national convention in Hyderabad in 1987 alongside prominent civic and religious leaders. Vijayam focused on equipping the Christian laity with both spiritual knowledge and practical means of livelihood. His efforts in fostering self-sustaining, indigenous grassroots evangelism earned recognition from prominent theologians, missiologists, and scholars, who praised his practical approach to ministry and lay empowerment.
