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The Under-Secretary-General and Emergency Relief Coordinator (USG/ERC) is responsible for the oversight of all emergencies requiring United Nations humanitarian assistance. He also acts as the central focal point for governmental, intergovernmental and non-governmental relief activities. The ERC also leads the Inter-Agency Standing Committee (IASC), a unique inter-agency forum for coordination, policy development and decision-making involving the key United Nations and non-United Nations humanitarian partners. The IASC was established in June 1992 in response to resolution 46/182. General Assembly resolution 48/57 affirmed the IASC's role as the primary mechanism for the inter-agency coordination of humanitarian assistance. In a country affected by a disaster or conflict, the ERC may appoint a Humanitarian Coordinator (HC) to ensure response efforts are well organized. The HC works with government, international organizations, non-governmental organizations and affected communities. An OCHA office will be established to support the HC. Mark Lowcock began the role of OCHA's USG/ERC on 1 September 2017. He succeeded Stephen O'Brien.

On 5 January 2017, United Nations Secretary-General António Guterres announced the appointment of Ursula Mueller of Germany as Assistant Secretary-General for Humanitarian Affairs and Deputy Emergency Relief Coordinator in the Office for the Coordination of Humanitarian Affairs (OCHA). The ASG/ DERC is the principal advisor to the USG/ERC, with an emphasis on key policy and management issues. The ASG/DERC supports the USG/ERC in the discharge of her responsibilities as the Secretary-General's main adviser on humanitarian issues. The ASG/DERC also exercises a managerial overview of OCHA, ensuring effective cooperation between New York, Geneva and the field, and coordinates the OCHA Senior Management Team (SMT) work process. She succeeded Kyung-wha Kang.


Rashid Khalikov oversees OCHA’s efforts to forge new alliances with governments and partners of GCC and Central Asia countries. He oversees emergency response tools and partnerships.

Gwi-Yeop Son is the Director of the Division for Corporate Programmes. She oversees OCHA’s administration and its work on communications, information services and policy development, and its management of the Central Emergency Response Fund.

John Ging is OCHA’s Operations Director. He oversees the day-to-day management of all OCHA field operations worldwide and on behalf of the Emergency Relief Coordinator. He is the daily focal point for supporting Humanitarian Coordinators. Mr. Ging is the lead adviser to the Under-Secretary-General on operational decision-making.

As Chief of the Emergency Services Branch, Rudolf Müller manages OCHA’s emergency tool and services. As Director of OCHA Geneva, he manages the Office, including strengthening collaboration with UNISDR and with Geneva-based humanitarian partners.


Yasser Baki is Chief of Staff to the Emergency Relief Coordinator and Under-Secretary-General of OCHA.

Mark Dalton is Chief of the Information Services Branch, which provides information services for OCHA staff and humanitarian partners globally.

Lisa Doughten is the Chief of the United Nations Central Emergency Response Fund (CERF) secretariat, which manages the global fund that provides essential resources to humanitarian operations world-wide.

Reena Ghelani is the Deputy Director of the Coordination and Response Division (CRD). She supports the day-to-day management of all OCHA field operations, supervises the New York-based management team, and oversees front office support to OUSG, OASG, and other branches and divisions within OCHA.


As head of the Administrative Service Branch (ASB) in New York and Geneva, he is responsible for directing and overseeing the provision of OCHA administrative services in headquarters and the field. He also provides strategic advice to senior management on budgeting, finance, procurement, human resources, general administration and strategic ASB corporate operations.

Amanda Pitt oversees OCHA's work in global news, public advocacy, crisis communications, reporting, visualization and analysis, and other tools, guidance and services for clients in the field and HQ.

Hansjoerg Strohmeyer joined OCHA in December 1998. He has been the Chief of OCHA’s Policy Development and Studies Branch since 2007. In this capacity, he also served as Secretary of the Secretary-General’s High-Level Task Force on the Global Food Crisis in 2008.

Marcy Vigoda leads the development of OCHA's partnership-and-inclusivity agenda, ensuring that all appropriate resources help to meet people’s needs in emergencies.

Edem Wosornu  oversees the strategic planning, monitoring and evaluation of OCHA’s work, and advises senior leadership on managing organizational risk.

Andrew Wyllie is Chief of the Programme Support Branch in OCHA Geneva. The branch facilitates and supports the development of policies, procedures, tools and technical guidance on the humanitarian programme cycle for the humanitarian community.