While teaching at the ecumenical College in Hyderabad, Yesurathnam evinced interest in pursuing research in Systematic Theology and went on to study for his doctoral degree at the South Asia Theological Research Institute, Bengaluru.
While teaching at the ecumenical College in Hyderabad, Yesurathnam evinced interest in pursuing research in Systematic Theology. Then Bishop-in-Medak, B. G. Prasada Rao who succeeded H. D. L. Abraham accorded Yesurathnam permission to take up doctoral studies at the South Asia Theological Research Institute, Bengaluru.