Natu Oswald Tweh, commonly known as N. Oswald Tweh, is a Liberian lawyer who served as Minister of Justice and Attorney General of Liberia from March 2024 to September 2026, and who was subsequently appointed Acting Minister of National Defense.
Education Tweh holds a Bachelor of Science with honours from Cuttington University (1984), a Bachelor of Laws with honours from the Louis Arthur Grimes School of Law at the University of Liberia (1986), and a Master of Laws from Harvard Law School (1988).
Legal career Tweh served as managing partner at Brumskine & Associates from 1993 to 1999. He later became managing director of the law firm Pierre Tweh & Associates, a position he took leave from upon entering government. He served as President of the Liberia National Bar Association from 2006 to 2008, and has also chaired the association's Grievance and Ethics Committee. In 2016, he was appointed Chairman of Liberia's National Board of Examiners. He is a member of the New York State Bar Association and the American Bar Association, and has specialised in corporate taxation, corporate law, international business, commercial transactions, and litigation.
Minister of Justice and Attorney General President Joseph Boakai nominated Tweh as Minister of Justice-designate in February 2024, and he was formally commissioned as Minister of Justice and Attorney General on 5 March 2024. The position carries statutory oversight of Liberia's law enforcement agencies and joint security sector, and serves as the government's chief legal adviser on contracts, foreign direct investment, and concessions. During his tenure, Tweh represented Liberia at international forums including the 30th ministerial meeting of the Inter-Governmental Action Group against Money Laundering in West Africa (GIABA) in Dakar, Senegal, and met with foreign officials including the United States Ambassador to Liberia and the Majority Leader of the Parliament of Ghana.
In September 2026, President Boakai announced Tweh would be reassigned from the Ministry of Justice; the announcement did not specify his next role in detail. Cllr. Betty M. Lamin-Blamo was named Acting Minister of Justice and Attorney General in his place, formally assuming the role on 10 September 2026 at a transition ceremony at the Ministry of Justice, during which she thanked Tweh for his service.
Acting Minister of National Defense On 11 September 2026, President Boakai appointed Tweh Acting Minister of National Defense, succeeding Brigadier General (Ret.) Geraldine George. Commentators noted the appointment placed a career lawyer, rather than a figure with a military background, in charge of the defense portfolio, though Tweh's prior role as Justice Minister had involved coordination on national security, law enforcement, and border matters.
The nomination drew public opposition from Bomi County Senator Edwin Snowe, who stated that Tweh had, in his assessment, performed poorly as Justice Minister and had contributed to the politicization of the justice system, and said he would vote against Tweh's Senate confirmation. As of September 2026, Tweh's confirmation as substantive Minister of National Defense remained pending before the Liberian Senate.
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