Booth is a Professor of Law at the University of Maryland School of Law. He teaches business associations, securities regulation, business planning, corporate finance, regulation of securities markets, and mergers and acquisitions. He also serves as the Faculty Editor of The Business Lawyer, the peer review journal of the American Bar Association Section of Business Law.

Prior to joining the Maryland faculty in 1990, Professor Booth practiced in New York with Donovan Leisure Newton & Irvine, primarily in the area of corporate and securities litigation, and taught at Southern Methodist University and Case Western Reserve. He has held visiting positions at Chicago-Kent, the University of Aberdeen (Scotland), and George Washington University.

Booth's recent research has focused on the impact of investor diversification on a range of corporation law questions and issues arising in connection with securities trading, from broker-dealer fraud to program trading. He has published extensively in scholarly journals and for the popular press, including the Wall Street Journal, the New York Times, the National Law Journal, and the Legal Times of Washington.