Biography
Mark concentrates his practice in complex civil and criminal litigation, internal corporate investigations and compliance programs. His practice is largely devoted to representing corporations, their officers and directors, and individuals in civil and white-collar criminal litigation, internal corporate investigations, and Congressional investigations. In addition, Mark is involved in alternative dispute resolution matters including arbitration and mediation, in the United States and abroad.

Mark has represented clients in a variety of national and international investigations and litigation matters. In 1998 and 1999, he acted as Special Counsel to the District of Columbia Council and conducted special investigations of the Metropolitan Police Department; he has also served as a Special Counsel to the D.C. Council on Anti-Terrorism Preparedness. From 2004-2007 Mark served as the Chair of the District of Columbia Sports and Entertainment Commission and oversaw the return of major league baseball to Washington, D.C. and the construction of a new downtown baseball stadium.

Mark served as an advisor to the Independent Commission on Policing For Northern Ireland, and he has served as a legal advisor to the office of the Attorney General of Ireland on various matters.