International organizations

• Commission for Environmental Cooperation
• United Nations
• World Intellectual Property Organization
• WTO
• International Telecommunications Union
• United Nations Human Rights
• World Health Organization
• International Criminal Police Organization

International courts and tribunals

• Inter-American Court of Human Rights
• ICC - Court of Arbitration
• International Court of Justice
• International Criminal Court
• International Criminal Tribunal for Rwanda
• International Criminal Tribunal for Yugoslavia
• International Tribunal for the Law of the Sea
• Permanent Court of Arbitration
• The Special Court for Sierra Leone
• Inter-American Court of Human Rights
• ICC - International Court of Arbitration
• Opportunities with International Tribunals and Foreign Courts (Yale Law School)

International financial institutions

• Asian Development Bank
• European Bank for Reconstruction and Development
• Inter-American Development Bank
• International Atomic Energy Agency
• International Monetary Fund

U.S. government agencies

• USAID
• US Trade Representatives
• United States Department of Justice

Non-governmental organizations

• American Non-Governmental Organization for the International Criminal Court
• Amnesty International
• Center for Constitutional Rights
• Center for International Environmental Law
• The Center for Justice & Accountability
• Center for Justice and International Law
• Center for Reproductive Rights
• EarthRights International
• Earth Justice
• Environmental Law Alliance Worldwide
• Environmental Law Institute
• Global Rights
• Human Rights in China
• Human Rights First
• Immigration & Refugee Appellate Center
• International Commission of Jurists
• International Crisis Group
• International Service for Human Rights
• The Advocates for Human Rights
• National Democratic Institute
• National Resources Defense Council
• Open Society Justice Initiative
• Association for International Arbitration
• Bank Information Center
• International Development Law Organization
• Aide Medicale Internationale
• International Law Institute
• International Justice Mission 
• International Republican Institute
• International Rescue Committee

International law job sites

• International Law Students Association
• Lawyers Without Borders
• American Society of International Law
• US Department of State, Employment Opportunities for US Citizens at the UN and other

International Organizations

• Relief web listing of openings with humanitarian organizations
• Lawjobs.com international positions
• World-Wide Legal Directory
• American Bar Association Listing of International Internships
• Finding and Funding International Public Service Opportunities (PSLawNet)
• Guide to International Public Interest Law (Yale Law School)
• Researching Careers in International Law: Resources in Print and Electronic Format (University of Chicago)
• National Security Positions: Lawfare Blog