Mario Hoang Nguyen

Mario Hoang Nguyen

White-Collar Criminal Defense Attorney at Locke Lord LLP
  • White Collar Crime, Criminal Law, Securities Law ...
  • Texas
Claimed Lawyer Profile

Mario Nguyen is a White Collar Criminal Defense and Investigations Attorney in Locke Lord’s Dallas office, led by a former U.S. Attorney for the Northern District of Texas. Mario is a dedicated trial attorney, skilled investigator, and legal scholar. He has spent over 200 hours in federal criminal trials, conducted investigations with millions of dollars at stake, published prominent criminal law articles, and teaches white collar criminal law as an adjunct law professor.

Mario represents individuals, public bodies, and private companies by advocating for them in criminal proceedings and collateral civil matters, helping them navigate government investigations, and conducting internal investigations on their behalf.

In addition to his devotion to criminal pro bono work, Mario is passionate about developments in criminal law. He teaches White Collar Criminal Law as an adjunct Law Professor at Texas A&M University School of Law, and authors legal articles that are regularly published and cited by major publications, such as the Wall Street Journal, The Texas Lawbook, JD Supra, and Law360.

Practice Areas
White Collar Crime
Criminal Law
Criminal Appeals, Drug Crimes, Expungement, Fraud, Gun Crimes, Internet Crimes, Sex Crimes, Theft, Violent Crimes
Securities Law
Antitrust Law
Business Law
Business Contracts, Business Dissolution, Business Finance, Business Formation, Business Litigation, Franchising, Mergers & Acquisitions, Partnership & Shareholder Disputes
Health Care Law
Gov & Administrative Law
Administrative Law, Election Law, Government Contracts, Government Finance, Legislative & Government Affairs
Jurisdictions Admitted to Practice
State Bar of Texas
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  • English: Spoken, Written
  • Spanish: Spoken, Written
Professional Experience
Adjunct Professor of Law
Texas A&M School of Law
- Current
Adjunct professor teaching a course in white-collar criminal law.
Associate Attorney
Locke Lord LLP
- Current
White Collar Criminal Defense & Investigations Department
S.J.C. Rule 3:03 Counsel
Harvard Legal Aid Bureau
Licensed to practice law, as part of one of Harvard Law School’s three honors societies, exclusively for ?low-income clients in civil matters for two years concurrent to legal education. Drafted all pleadings; ?managed discovery; conducted depositions; negotiated settlements; performed client intake; and argued ?before the Massachusetts Appeals Court, trial courts, family courts, and administrative law tribunals.?
Summer Associate
Lieff, Cabraser, Heimann & Bernstein
Performed legal research, drafted memoranda, and interviewed clients for plaintiff-side whistleblower qui ?tam litigation.?
D Best: White-Collar Criminal Defense
D Magazine
One of the top 25 white-collar criminal defense attorneys by D Magazine.
2019 DAYL Leadership Class
Dallas Association of Young Lawyers
The DAYL selects approximately 40 young lawyers of all practice areas, firm sizes, and levels of experience to participate in the DAYL Leadership Class, which provides opportunities for young lawyers of all backgrounds to develop relationships with local city leaders and network with one another. The Leadership Class provides a forum to contribute to the operation and improvement of the community. With over 800 alumni, including judges, general counsels, law school professors, city leaders, and law firm name partners, the Leadership Class has been emulated by bar associations across the state and the country and serves as a gateway for leadership among lawyers in the North Texas area.
William J. Stuntz Memorial Award for Justice, Human Dignity, & Compassion
Harvard Law School
The William J. Stuntz Memorial Award for Justice, Human Dignity and Compassion recognizes a graduating student who has demonstrated an exemplary commitment to these principles while at Harvard Law School. The award was created in honor of the late William J. Stuntz, a renowned scholar of criminal justice at Harvard Law School, an evangelical Christian, and a teacher much beloved by students and colleagues.
Best Brief
Harvard Law School
Best brief for the Semi-final Round of the Harvard Law School Ames Moot Court Competition.
40 Under 40: Latinxs in Foreign Policy
Huffington Post
HuffPost named 40 Latinxs to watch for in the realm of foreign policy and international affairs who are on their way towards opening doors for the next generation. Selection of the 2016 list was done by a committee of peers.
U.S. Fulbright Scholar
U.S. Department of State Fulbright Commission
U.S. Binational Business Fulbright Scholar to Mexico.
Professional Associations
State Bar of Texas  # 24105873
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Articles & Publications
Defense Lawyers Proffer at their own Peril in the Northern District of Texas
Texas Lawbook
A Slim New Rule of Criminal Procedure
Contact & Map
Locke Lord LLP
2200 Ross Avenue
Suite 2800
Dallas, TX 75201
Telephone: (214) 740-8515