Diana O’Brien is the Deputy Director of Public Prosecutions at the Office of the Director of Public Prosecutions, Georgetown, Guyana. She previously served as State Counsel, Senior State Counsel and Assistant Director of Public Prosecutions at the said Office. Mrs. O’Brien holds a Bachelor of Social Science in International Relations and a Bachelor of Laws. She attained the Legal Education Certificate from the Hugh Wooding Law School in 2011, and was called to the Bar in Guyana that year. Additionally, she is a Hubert H. Humphrey Fellow (Fulbright Scholar) who studied at the American University Washington College of Law in the field of Trafficking in Persons Policy and Prevention.
Mrs. O’Brien’s extensive duties as Deputy DPP include appearing at the Caribbean Court of Justice and the Court of Appeal of Guyana, and providing legal advice and training to Public Officers in diverse areas. Her areas of expertise in criminal law include financial crime, human trafficking, environmental crime and maritime crime. She is versed in conducting research and preparing indictments, legal opinions and applications.
Mrs. O’Brien heads the Prosecution and Legal Issues Sub-committee of the Ministerial Task-Force on Trafficking in Persons where she has been a representative for the past ten years. She is also a Board member of the Poor Law Commission, Ministry of Human Services and Social Security for the past five years.
Mrs. O’Brien represents the Guyana Presidency for 2026 along with Mr. Fazil Karimbaksh and Mr. Matthew Langevine.
