Called “the best in class” by Chambers USA, Frank is a litigator who represents individuals and entities in complex civil litigation, regulatory enforcement, and white-collar criminal matters.  His clients include a wide range of for-profit and nonprofit entities, including financial institutions, public and private corporations, law firms, universities, and hospitals. Frank has 

also represented a broad spectrum of individuals, from business executives to financial market participants, lawyers, accountants, art dealers, and other professionals. 

Frank has devoted a substantial portion of his practice to attorney ethics matters,  defending and advising lawyers and law firms and appearing as an expert witness. He has also served as a member of the Departmental Disciplinary Committee of the New York  Supreme Court, Appellate Division, First Department; the Attorney Grievance Committee of the  United States District Court for the Southern District of New York, and the Ethics and  Professional Responsibility Committees of the New York City Bar Association. Frank has chaired over twelve New York City Bar Association programs on topics related to ethical and strategic issues in corporate investigations. 

Early in his career, Frank served in the United States Attorney’s Office for the Southern District of New York, where he was appointed Assistant Chief of the Criminal Division and subsequently  Chief of the Civil Division. More recently, he served as the President of the Federal Bar Council.