León Castellanos-Jankiewicz

International law expert on arms trade and human rights

Recent publications

Dutch Court Halts F-35 Aircraft Deliveries for Israel

Verfassungsblog, February 14, 2024

SCOTUS Rules for Gun Manufacturers in Mexico Suit but Denies Blanket Immunity

Just Security, June 23, 2025

El País, July 31, 2023

The armor of the European arms industry

My work appears in

Interviews & press

  • 'The responsibility of gunmakers doesn’t end at the factory gate'

    El País, June 11, 2025

  • Google worried it couldn’t control how Israel uses project Nimbus, files reveal

    The Intercept, May 13, 2025

  • Can Mexico win its battle with US gun companies?

    BBC, March 7, 2024

New report

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New report *

Access to Justice for Wrongful Arms Transfers

A project under my supervision at the University of Amsterdam Law Clinics

International Law Clinic

Selected speeches & talks

  • UN Working Group on Firearms panel presentation on arms embargoes and the destruction of surplus stockpiles

    Vienna, April 29, 2025

  • American Society of International Law, 119th Annual Meeting — Hague Closing Plenary: 'Can Arms Trade Bring About Peace?'

    Washington D.C., April 18, 2025

  • International Forum on Trafficking and Diversion of Firearms in Latin America

    Mexico City, February 25, 2025

  • León Castellanos-Jankiewicz delivers a presentation at the conference on The Business of Lethality held in El Colegio de México on November 4, 2022.

    UN Working Group on Firearms panel presentation on accountability of private security companies

    Vienna, April 4, 2024

  • León Castellanos-Jankiewicz delivers a speech at the UN Constructive Dialogue on Firearms in Vienna on May 5, 2023.

    Statement on EU due diligence at the UN Constructive Dialogue on Firearms

    Vienna, May 5, 2023

  • León Castellanos-Jankiewicz in dialogue with Alejandro Celorio Alcántara, Principal Legal Advisor of the Mexican Ministry of Foreign Affairs.

    Expert Roundtable on Transnational Civil Litigation and Corporate Liability: Mexico v Smith & Wesson

    The Hague, May 2, 2022

Contact

Email

L.castellanos@asser.nl

Twitter/X

https://x.com/leoncastjan

Address

Asser Institute for Internatonal and European Law

R.J. Schimmelpennincklaan 20-22

2517 JN, The Hague

The Netherlands