Mr. Tessier has handled thousands of cases, hundreds of in-court proceedings, mediations and arbitrations, including rocket docket restraining orders and preliminary injunction prosecutions, more than 36 jury trials and 54 plus appellate matters, many of which have resulted in published opinions, including practice before the United States Supreme Court. His work has contributed to molding significant elements of the nation's jurisprudence for a client base consisting of individuals, law firms, law enforcement agencies, military concerns, government entities and Fortune 100 corporations across North America, South America, Asia and Europe, including criminal and civil antitrust and competition law matters before the Antitrust Division of the U.S. Department of Justice, the U.S. Federal Trade Commission, various state attorneys general, the International Trade Commission, the U.K. Office of Fair Trading and Competition Commission, and the European Commission.