Since 2003, the Law Office of Harvey S. Mars LLC has provided representation to Employees, Labor Organizations and Employers in all facets of labor, employee benefits and employment law. Harvey has also provided legal representation to clients in a diverse variety of matters ranging from collective bargaining negotiation, arbitration, employee benefit litigation, employment discrimination litigation and administrative proceedings before the National Labor Relations Board, New York State Employment Relations Board, The United States Equal Employment Opportunity Commission, The New York State Division of Human Rights and The New York City Commission on Human Rights.

He is admitted to practice in New York, New Jersey, Pennsylvania and the District of Columbia

In addition, Harvey has handled a large variety of litigated matters including commercial, contractual, employment, bankruptcy, ERISA, attorney malpractice and copyright litigations. His litigation practice extends to all United States District Courts within the State of New York (Southern, Eastern, Northern and Western Districts of New York) and New Jersey, The New York State Supreme Courts for Kings, Queens, Richmond, New York, Nassau and Westchester Counties. Harvey has also argued appeals before the United States Court of Appeals for the Second and Third Circuits as well as The Appellate Division For The First and Third Departments of New York.