Mr. Marshall practices traditional labor and employment law. He has handled numerous union campaigns for clients across the country, and has significant experience in dealing with organizing activity by many unions, including but not limited to the Teamsters, UNITE, PACE, and the IBEW. He has also handled numerous strikes across the country, the most recent strike involving a major utility company.

He also focuses on positive employee relations, and works with supervisors and other members of management in this regard. He spends a significant amount of time negotiating collective bargaining agreements for companies, devising bargaining strategies, and coordinating management/labor relations.

He handles employment law discrimination suits, and has litigated and tried cases in various state and federal courts. These include race, sex, age, and sexual harassment lawsuits, as well as wrongful discharge claims. In addition, he has co-authored two articles on the at-will doctrine in U.S. periodicals. He has also co-authored an article in a German legal periodical on covenants not to compete in the United States. He has served as an adjunct professor of law at the University of Richmond for three years, and is a contributing editor to the ABA's Developing Labor Law.