Nimmer is currently the dean and Leonard Childs Professor of Law at the University of Houston Law Center and co-director of the Houston Intellectual Property and Information Law Institute. He has also served as the Fulbright Distinguished Chair of International Commercial Law at Universidad Catholica in Lisbon, Portugal. Admitted to practice in Illinois, Texas, and the United States Supreme Court, Professor Nimmer is a consultant to the National Science Foundation and the Office of the Legal Advisor of the U.S. State Department. In addition to his expertise in technology issues, he is an expert in areas of business law. He was the co-reporter to the Drafting Committee on Revision of UCC Article 2 and the reporter for the Uniform Computer Information Transactions Act.

Professor Nimmer is the author of more than 20 books and numerous articles. He is a member of the American Law Institute, the Texas Bar Foundation, and the American College of Commercial Finance Attorneys, and a frequent speaker at programs in the United States and abroad in the areas of intellectual property, business, and technology law.

Professor Nimmer is listed in Who's Who in America, Who's Who in Law, the International Who's Who of Internet Lawyers, and the International Who's Who of Business Lawyers. The first edition of his book The Law of Computer Technology received a national book award from the Association of American Publishers in 1985.