Mary has extensive experience defending complex white collar criminal cases, particularly in matters involving the Foreign Corrupt Practices Act, export enforcement, including the Arms Export Control Act, International Traffic in Arms Regulations, International Emergency Economic Powers Act, Export Administration Act, and health care fraud and abuse. She also has successfully represented clients in cases involving government contract and procurement fraud, political corruption, and improper political contributions.

With more than 20 years of trial experience and as a former federal prosecutor, Mary understands the anatomy of a government investigation and she is sensitive to the impact government investigations have on corporate clients. She has represented business entities, corporate executives and employees who have been under criminal investigation or criminally charged. Mary has represented clients appearing before a grand jury, responded to grand jury and administrative subpoenas and civil investigative demands, prepared voluntary disclosures and an FCPA monitor’s report, and negotiated criminal and civil settlements with both federal and state prosecutors. She also has significant experience in parallel criminal and civil proceedings involving the False Claims Act, ITAR, IEEPA, and U.S. sanctions laws.

Prior to joining Arent Fox, Mary was an Assistant US Attorney in the US Attorney's Office in the Central District of California, where she served as the Chief of the Public Corruption and Civil Rights Section; and Deputy Chief of the Public Corruption and Government Fraud Section. She also served as Health Care Fraud Coordinator and as a member of the US Department of Justice, Attorney General's Advisory Committee, Health Care Fraud Subcommittee.

Mary received the Attorney General’s Director's Award for her role as the lead federal prosecutor in the LAPD Rampart Investigation. She regularly served as an instructor to federal law enforcement agencies and at the US Department of Justice, National Advocacy Training Center.

Mary’s professional affiliations include:

• Lawyer Representative, Ninth Circuit Judicial Conference (2011 to present)
• Federal Bar Association, Los Angeles Chapter, Executive Board President (2010 to 2011) President-elect (2009 to 2010), Treasurer (2008 to 2009), Secretary (2007 to 2008), Current Board Member
• Los Angeles County Bar Association, Judicial Appointments Committee (2011 to present)
• American Bar Association, Criminal Justice Section White Collar Crime Committee: Foreign Corrupt Practices Act and Corporate Responsibility Subcommittees
• American Bar Association, West Coast White Collar Crime Committee, Co-Chair (2004 to 2006)
• Institute for Corporate Counsel, Executive Board (2009 to 2012)
• Los Angeles County Bar Association, Member
• American Bar Association, Member
• Executive Committee, Afghan Public Private Partnership (2009 to 2012)

Mary was recognized by Best Lawyers in America 2013 for her achievements in Criminal Defense: White Collar, and has been recognized by the Southern California edition of Super Lawyer as a 2012 Top Women Attorney.

Mary was chosen as the “Pro Bono Attorney of the Year” by the University of Southern California Public Interest Law Foundation in 2009.

Mary’s published works include:

• “False Claims and ITAR - A Lethal Combination,” Law360; February 2011
• “ITAR Enforcement Update and Q&A” and “What to Do if You Suspect or Discover a Violation: When and How to Investigate, Prepare a Voluntary Disclosure and Implement Remedial Measures,” American Conference Institute, ITAR Boot Camp; February 2011
• “Increasing Government Scrutiny of Pharmaceutical Executives,” Arent Fox LLP Client Alert; December 2010, co-author
• “FCPA Shouldn’t Be Platform For Derivative Litigation,” Law360; November 2010
• “Fueling FCPA Enforcement,” Law360; October 2010
• White Collar Defense Roundtable, California Lawyer; July 2010
• “What to Do When Agents Show Up At Your Door,” American Conference Institute, Export Enforcement & Investigations; January 2010
• “Deemed Export Enforcement: The Anatomy of a ‘Good’ Intangible Case and Why More Cases are Expected,” American Conference Institute, Export Enforcement and Investigations; January 2009
• “Internal Affairs,” Los Angeles Daily Journal; July 2009, co-author
• “Export Crimes,” American Bar Association Annual National Institute on White Collar Crime; March 2008
• “Politics and Prosecutors: Maintaining the Independence of Federal Prosecutors,” Federal Bar Association & American Bar Association, West Coast Regional White Collar Crime Committee; February 2008
• “Anatomy of a Good Export Case: How Prosecutors Assess a Violation,” American Conference Institute, Export Enforcement & Investigations; January 2008
• "When the Department of Justice Comes Calling,” Institute for Corporate Counsel; October 2007
• “Export Enforcement & Investigations, Knowledge and Intent: The Prosecutors’ Perspective On What the Government Needs to Prove at Trial,” American Conference Institute; December 2006
• “Federal Sentencing Guidelines,” Federal Bar Association; September 2003
• “Crossfire Redux - A Dialogue Between the United States Attorneys Office and the Criminal Defense Bar,” American Bar Association, West Coast Regional White Collar Crime Committee; July 2000
• “White Collar Crime,” American Bar Association; 2000
• “Health Care Fraud,” American Bar Association; 2000
• “Health Care Fraud,” American Bar Association, Criminal Justice; May 1998

Mary’s speaking engagements include:

• “Money Laundering, Remitting & Export Control,” ABA 2012 International White Collar Crime Conference, London, England; October 2012
• “Managing an FCPA Investigation and Prosecution,” 7th FCPA & Anti Corruption Compliance Conference, San Francisco, CA; September 2011
• “International Government Investigations, SEC Whistleblowers, and Private Fellow On Actions: Playing Chess on Multiple Boards,” ABA 2011 Annual Meeting, Toronto, Canada; August 2011
• “Defending the Individual in FCPA Cases: Managing the Company, Dealing with the Facts,” National Association of Criminal Defense Lawyers’ West Coast White Collar Conference, Lake Tahoe, NV; June 2011

While attending law school, Mary was executive notes editor for the Southern California Law Review.

Mary is involved with family and community organizations, St. Elizabeth Catholic Church, and with her son attending the University of Montana, she is a Grizzlies fan.