Meet our Lawyers

Joyce Williams

Owner and Managing Attorney at Armooh-Williams, PLLC.


Joyce Williams is the Owner and Managing Attorney at Armooh-Williams, PLLC. She focuses her practice on International Trade, Business, and Immigration Law. Prior to founding Armooh-Williams, PLLC, Joyce worked as a consultant at SILLAC, S.C where she advised individuals and multinational companies from Latin America and the Caribbean on U.S Trade policies.

From 2013 to 2017, she worked at the United Nations Commission on International Trade Law in Incheon, South Korea, the National Law Center for Inter American Free Trade in Tucson, Arizona, and the International Law Institute in Washington, D.C.

Joyce, through the Africa Bar Association and the American Bar Association, has provided technical assistance to lawyers and governments across Africa on the use of Arbitration as a vehicle to improve the business environment and attract foreign direct investments.

Joyce Williams currently serves on the boards of United Community Ministries (UCM) and Asankrangwa Kroye Kuo. She volunteers at UCM-Progreso where she provides pro bono legal services for clients on the path to US citizenship. She is a former board member of Bakashana in Zambia.

  • International trade
  • Immigration law
  • Business law & corporate governance
  • American Bar Association - Member
  • Section of International Law, American Bar Association
    • Vice Chair, Rule of Law International Trade Committee
    • Vice Chair, Publications Corporate Counsel Committee
    • Editor in Chief, Africa Law Today Journal, Africa Committee
    • Vice Chair, Communication & Policy, Africa Committee
  • African Bar Association, Special Advisor, Programs & Partnerships
  • American Society of International Law - Member

Arizona (2014)

  • Arizona Summit Law School (Juris Doctor of Law)
  • Campbell University (Bachelor of Arts Economics)
  • Diversity Fellow, American Bar Association, Section of International Law
  • Outstanding Committee Member, Africa Committee, ABA-SIL.
  • Outstanding Collaboration Between Committees on a Non-CLE Committee Program “Enhanced Supply Chain Security: Combating Human Trafficking and Other Smuggling Through Legitimate Trade.” ABA-SIL.
  • Heart of the Community Award, United Community Ministries
  • English
  • Twi
  • Joyce Williams, Editor, The Counsel, ABA International Corporate Counsel Newsletter, Vol 1 (2017).
  • Joyce Williams, “Analysis of the CISG Article 35-Conformity of the Goods in the Changing Power Dynamics of Corporate Social Responsibility”, Comparative Law Journal of the Pacific. ISSN: 17721644. (2015).
  • Glenys P. Spence and Joyce Williams, “The Applicability of the U.N. Convention on the International Sale of Goods (CISG) to Emerging and Developing Economies” Brazil and the CISG,” ISBN 978- 8566722- 31-4 (2015).
  • Joyce Williams, "Increasing Private Sector Participation in Ghana through the Adoption and Implementation of the CISG." Africa Law Today, Vol. 4, Issue 4 (2012).
  • Panelist: Ghana Diaspora Business Development Conference, Washington D.C, 2018
  • Panelist: Creating a Sustainable Business Environment Conference, Port Harcourt, Nigeria, 2017
  • Speaker: Young Lawyer’s Forum. African Bar Association, Port Harcourt, Nigeria, 2017
  • Panelist: Philip C. Jessup International Law Moot Court /ABA Pathways to Employment In International Law, Washington D.C, 2017
  • Panelist: Rule of Law Conference, African Bar Association, Harare, Zimbabwe, 2016
  • Panelist: The New York-Africa Forum, Libreville, Gabon, 2015
  • Panelist: The Evolving Spectrum in ADR Conference, Accra, Ghana. 2015
  • Panelist: UNCITRAL Asia-Pacific Fall Conference, Macau SAR, 2014
  • Moderator: "The Legal Implications of Regional Integration Systems in Africa," Teleconference, 2014
  • Panelist: “The Wealth of Latin America and the Caribbean: Investing in the Latin America and the Caribbean Region,” Webinar, Sept. 2014
  • Speaker: “Investing in Ghana: Doing Business in Ghana,” Symposium Washington, DC., 2014
  • Panelist: CISG Congress, Curitiba, Brazil, 2014

Nathania Ustun

Of Counsel at Armooh-Williams, PLLC.


Nathania Ustun is senior Counsel at Attorney at Armooh-Williams, PLLC. She focuses her practice on international arbitration, immigration law, and federal employment law (Title VII). Before joining Armooh-Williams, PLLC, Nathania served as an Associate at the International Law Institute, where she helped organize training sessions and seminars in commercial and investment arbitration for international judicial and government trainees.

Nathania Ustun served as a Financial Advisor and an Estate Planning Specialist at New York Life and worked in employment law for the Massachusetts Commission against Discrimination (MCAD). In Boston, she also practiced immigration law. Prior to her legal career, she worked at the United Nations as a political analyst and a speech writer for the UN Secretariat, as well as the South Korean and Indonesian missions to the United Nations.

  • Immigration Law
  • Alternative Dispute Resolution
    • Mediation
    • International Commercial Arbitration
    • International Investment Arbitration
  • Federal Employment Law
  • American Bar Association (ABA) - member
  • Section of International Law (ABA)
    • Middle East Committee
    • Arbitration Committee
    • Canadian Committee (Vice-chair on Rule of Law)
  • American Society of International Law (ASIL) - Member
  • American Immigration Lawyers Association (AILA) - Member
  • Association des Anciens de Sciences Po. – Member
Massachusetts (2007)
  • Boston College Law School, Newton Centre, MA
    Juris Doctor, 2006
  • Columbia University, New York, NY
    Master of Arts, 1994
  • The American University in Cairo, Cairo, Egypt
    Arabic Language Certificate, 1993
  • Institut D’Etudes Politiques de Paris (Sciences Po), Paris, France
    Bachelor of Arts, 1989
  • French – English (bilingual)
  • Arabic (Conversational and Reading)
  • Turkish (Conversational)
  • Spanish (Conversational and Reading)
  • American University, Washington College of Law, Washington, D.C.
    2016, 2017, 2018
    Certificate, Arbitrator at the Fifth, Sixth, and Seventh, L.L.M. International Investment Arbitration Moot Competition
  • American University, Washington College of Law, Washington, D.C.
    Jun. 2015
    Workshop, Advocacy in International Commercial Arbitration
  • American University, Washington College of Law, Washington, D.C.
    Certificate, Arbitrator at the Fourth L.L.M. International Commercial Arbitration Moot Competition
  • American University, Washington College of Law, Washington, D.C.
    Certificate, International Commercial Arbitration
  • Massachusetts Bar Association, Boston, MA
    Certificate, Mediation with Judge J.R. Kass