He became involved in the Bhopal gas victims' quest for justice even before he graduated from the Washington College of Law at American University, Washington, in 1996. Since then he has been compiling, with the help of survivors' organisations, evidence for the case against Union Carbide Corporation (UCC). As counsel for five organisations representing survivors and for seven individual victims, Sharma argues before the United States District Court for the Southern District of New York, seeking damages for environmental contamination, medical monitoring, and the clean-up of the plant, which polluted sub-surface groundwater in more than a dozen adjacent communities.