After studying at the D.B College Sasthamcotta, he joined the ‘Brahmavidya Acharya’ course in 1985 at the Sivagiri Mutt Varkala. The Brahmavidya Acharya course is a seven year course conducted by the Sree Narayana Sivagiri Mutt for prospective sanyasins. Seven years they teach Yoga, Vedanta and other schools of Indian philosophy. Sunil successfully completed the Brahma vidya acharya course under the guidance’s of Swami Chitkananda, Swami Kaivalyananda, Prof.R Vasudevan Potti, Prof.G Balakrishnan Nair and others. Sunil had done 5 years of karma yoga, after his study at the ashram.