Has performed more than 12,000 major surgeries on brain, nerve and spine from (1981-2001), He joined Sree Chitra Tirunal Institute, Trivandrum as a faculty member in 1987, Later he worked at University of Tubingen and Ulm in Germany. The neurosciences unit at Bokaro, one of the best in the state of Jharkhand, India was founded and established by him, Major Classification No. of surgeries (1981-2001), Spinal Surgery 4032, Brain Tumors 3007, Transnasal Pituitary Removal 111, Aneurysm/AVMS 201, Peripheral Nerve Surgery 1003, Shunt Surgery 509, Head Injury 2250