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Mark J. O'Brien

Mark J. O'Brien

O'Brien Hatfield, PA
  • Criminal Law, White Collar Crime
  • Florida, Massachusetts, Montana
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Biography

O’Brien Hatfield, PA is a federal and state criminal defense law firm with offices in Tampa, Florida, Orlando, Florida, and Miami, Florida. Attorney Mark J. O’Brien is the firm’s managing partner and handles federal criminal cases throughout Florida and across the country. Attorney Victoria E. Hatfield is an equity partner who defends criminal cases in every county and circuit court in the State of Florida. Oliva M. Goodman is a partner and in charge of the firm’s criminal appellate division handling appeals and post-convictions motions.

The United States Constitution guarantees every individual the right to a fair trial and the presumption of innocence until proven guilty. This fundamental principle is upheld in federal criminal defense, where Mr. O’Brien works tirelessly to protect the rights of the accused.

The role of a criminal defense attorney is to provide legal representation to individuals charged with federal crimes. These crimes can range from drug trafficking and white-collar crimes to terrorism and espionage. The stakes are high, as a conviction can result in lengthy prison sentences, hefty fines, and a criminal record that can follow an individual for the rest of his or her life.

One of the key arguments in favor of hiring Mr. O’Brien for your federal criminal defense is the importance of protecting the rights of the accused. The Constitution guarantees the right to a fair trial, which includes the right to legal representation. Without a skilled attorney like Mr. O’Brien, a federal defendant may not fully understand their rights or the legal process, which can lead to an unfair trial and an unfair result.

Practice Areas
Criminal Law
Criminal Appeals, Drug Crimes, Expungement, Fraud, Gun Crimes, Internet Crimes, Sex Crimes, Theft, Violent Crimes
White Collar Crime
Fees
  • Free Consultation
  • Credit Cards Accepted
Jurisdictions Admitted to Practice
Florida
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Massachusetts
Massachusetts Board of Bar Overseers
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Montana
State Bar of Montana
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1st Circuit
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2nd Circuit
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6th Circuit
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11th Circuit
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U.S. Supreme Court
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Languages
  • English
  • Mandarin
  • Spanish
Professional Experience
Partner
O'Brien Hatfield, PA
- Current
Prosecutor
Miami Dade State Attorney's Office Felony Division
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Education
Widener University Delaware School of Law
J.D. (1998)
Widener University Delaware School of Law Logo
Siena College
B.A. (1995)
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Awards
Top 100 Trial Lawyers
National Trial Lawyers
Top 40 Under 40
The National Trial Lawyers
Super Lawyer
Super Lawyers
2016-2024
Professional Associations
Florida State Bar  # 160210
Member
- Current
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Publications
Articles & Publications
Strategies For Defending Identity Theft Cases
Aspatore
Speaking Engagements
Criminal Trial Advocacy, Intensive Trial Advocacy Program
Websites & Blogs
Website
Contact & Map
South Florida Office
1001 Brickell Bay Drive
Suite 2700 M-1
Miami, FL 33131
Monday: Open 24 hours
Tuesday: Open 24 hours
Wednesday: Open 24 hours
Thursday: Open 24 hours (Today)
Friday: Open 24 hours
Saturday: Open 24 hours
Sunday: Open 24 hours
Notice: Please call or text (813) 733-5336 for immediate access to attorney Mark J. O'Brien.
Orlando Office
121 South Orange Avenue
Suite 1500
Orlando, FL 32801
Monday: Open 24 hours
Tuesday: Open 24 hours
Wednesday: Open 24 hours
Thursday: Open 24 hours (Today)
Friday: Open 24 hours
Saturday: Open 24 hours
Sunday: Open 24 hours
Notice: Please call or text (813) 733-5336 for immediate access to attorney Mark J. O'Brien.
Tampa Office
511 West Bay Street
Suite 330
Tampa, FL 33606
Telephone: (813) 733-5336
Monday: Open 24 hours
Tuesday: Open 24 hours
Wednesday: Open 24 hours
Thursday: Open 24 hours (Today)
Friday: Open 24 hours
Saturday: Open 24 hours
Sunday: Open 24 hours
Notice: Please call or text (813) 733-5336 for immediate access to attorney Mark J. O'Brien.