Steering Group

GAAMAC is an incubator of new ideas to promote the awareness of atrocity prevention, encourage the coordination among prevention actors and the gradual development of national prevention mechanisms. It provides the contacts and links between resource seekers and resource offerors, in terms of funding, knowledge, experience and technical expertise.


The Steering Group is led by a State representative and is composed of 12 members appointed by a State, an intergovernmental or civil society organisation. The persons appointed are representing and express the views of the State or the organisation with which they are affiliated.


Ministry of Foreign Affairs and Worship

Costa Rica

Ministry of Foreign Affairs and Worship


Ministry of Foreign Affairs

Republic of Ghana

National Peace Council


Federal Department of Foreign Affairs

The United Republic of Tanzania

Ministry of Foreign Affairs and International Co-operation

Harvard University

FXB Center for Health and Human Rights, Harvard School of Public Health

Genocide Prevention Advisory Network

Global Centre for the Responsibility to Protect

International Coalition for the Responsibility to Protect

Liberation War Museum

Sant'Egidio Foundation for Peace and Dialogue

Subsidiary Bodies

The Steering Group has two subsidiary bodies: the Virtual Working Group on Partnerships and the Virtual Working Group on Regional and Thematic Initiatives. The Steering Group can create further subsidiary bodies whenever it considers it useful.


The Chair conducts the work of the Steering Group and the Support Office and represents GAAMAC in external relations. In the exercise of his or her functions, the Chair seeks to promote awareness and understanding for GAAMAC, its goals and activities and supports fundraising efforts. The Chair is elected for a mandate of three years and acts under the authority of the Steering Group.

Current Chair

Christian Guillermet-Fernández

“I have always been personally and professionally committed to the protection of civilians, strengthening international human rights standards, and alleviating human suffering. I bring that commitment to the Presidency of GAAMAC. Now more than ever, in view of the difficult times we are facing, and international humanitarian law being disrespected and disregarded over and over again, we need to continue working together vigorously towards the strengthening of national architectures for prevention. Civilians matter and initiatives like GAAMAC allow people on the ground, grassroots organizations, and different stakeholders to engage, learn from each other, and create synergies to make the promise of never again a reality.”

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Mr. Christian Guillermet-Fernández is the Chair of GAAMAC. He has been a career diplomat in the Costa Rican foreign service since 1998 and, from April 2020 to June 2023, was appointed as Deputy Minister of Multilateral Affairs.

He has studies in Law and International Relations with extensive experience in multilateral affairs, human rights, peace and security, International Humanitarian Law, International Law, humanitarian disarmament, and he is a great connoisseur of multilateral dynamics and particularly the United Nations.

During his experience in the Foreign Service and in the Ministry of Foreign Affairs and Worship, he worked as Ambassador and Deputy Permanent Representative at the Permanent Mission of Costa Rica to the United Nations in New York (2019-2020); Director General of Foreign Policy of the Ministry of Foreign Affairs of Costa Rica (2016-2018); Deputy Director General of Foreign Policy (2015-2016); Deputy Permanent Representative of Costa Rica to the United Nations in Geneva (2010-2015); Deputy Permanent Representative and Political Coordinator during Costa Rica’s membership in the Security Council at the Permanent Mission of Costa Rica to the United Nations in New York (2008-2009); Director General of Foreign Policy after working with the Office of the United Nations High Commissioner for Human Rights in Geneva and in Santiago, Chile as Regional Representative a.i. of the High Commissioner (2006-2008).

From 1993 to 1998, Mr. Guillermet-Fernández was an official in the Office of the Ombudsman of Costa Rica, at the beginning of the creation of the Institution. During his diplomatic career, he worked as Chair-Rapporteur of the United Nations Open-ended Working Group on the Right to Peace, among others. In addition, he has collaborated extensively with different universities and think tanks and has written for prestigious peer-reviewed journals worldwide.

Past Chairs

Silvia Fernández de Gurmendi +

Silvia Fernández de Gurmendi was the Chair of GAAMAC from 2020 to 2023. She is a former Judge and President of the International Criminal Court (ICC). She is currently the President of the Assembly of State Parties of the ICC and President of the Latin American Society of International Law. She has extensive diplomatic experience and expertise in international humanitarian and human rights law. Among other functions, she has been Special Representative of Argentina to the International Holocaust Remembrance Alliance (IHRA), Director General for Human Rights at the Ministry of Foreign Affairs of Argentina and legal adviser at the Permanent Mission of Argentina to the United Nations in New York. She has played a leadership role in the creation and setting up of the ICC. She holds a Law Degree from the University of Cordoba (Argentina), a Master Degree in Public Law from the University of Limoges (France) and a Ph.D. in Law from the University of Buenos Aires (Argentina). She speaks Spanish, English and French.

Mô Bleeker +

Mô Bleeker acted as the first GAAMAC Chair until November 2019. Former Special Envoy on Dealing with the Past and Prevention of Atrocity at the Swiss Federal Department of Foreign Affairs (FDFA), she has been working for decades in societies engaged in processes of transition, and/or in peace processes in Central America, Colombia, the Balkans, South Caucasus, South and South East Asia, Central Asia, Central, North, and West Africa. She chaired the Transitional Justice and Reconciliation Commission in the Philippines created in 2014 and acted as Chair of the International Advisory Board of the National Historical Memory Commission in Colombia. From 2017 until end of 2021, she also acted as Special Envoy for Peace in Colombia. She holds degrees from  the University of Fribourg (Switzerland) and  the Graduate Institute of International and Development Studies in Geneva. Ms Bleeker is now a Member of GAAMAC’s Board.

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