In the year 1984, Justice (retd.) M. Karpaga Vinayagam set up his own office and built up a lucrative practice on Criminal matters. In 1993, he was nominated as an Editor for the Law Journal “Current Criminal Reports” (C.C.R.), New Delhi. Having a love for Tamil language, he started “Lawyers Literacy Society” to ensure that the lawyers enjoy Tamil literature.
During the year 1994, the International Institute of Tamil Studies, run by the Government of Tamil Nadu, invited him to present papers in the Seminar on the topic “Criminal Law in the Ancient Period”. The Government has published the papers in the form of a book to enable the public to know about the comparative study of the criminal laws.
In 1996, he was elevated as a Judge of the High Court of Judicature at Madras and on 17.09.2006, he was elevated as the Chief Justice of Jharkhand High Court, Ranchi, where he retired. Even after his retirement he is still very enthusiastic to resolve disputes.