UN organizations
(FAO) Food and Agriculture Organization
Director-General - José Graziano da Silva, Brazil (2012–present)
(IAEA)International Atomic Energy Agency
Director-General - Yukiya Amano, Japan (2009–present)
(ICAO)International Civil Aviation Organization
President of the Council - Olumuyiwa Benard Aliu, Nigeria (2013–present)
Secretary-General - Raymond Benjamin, France (2009–present)
(ILO)International Labour Organization
Director-General - Guy Ryder, UK (2012–present)
United Nations (UN)
Secretary-General - Ban Ki Moon, South Korea (2007–present)
President of the General Assembly - Mogens Lykketoft, Denmark (2015 - present)
Security Council members - China, France, Russia, United Kingdom, United States (permanent members); Chad, Chile, Jordan, Lithuania, Nigeria (2014 - present)
United Nations Children's Fund (UNICEF)
Executive Director - Anthony Lake, United States (2010–present)
United Nations Educational, Scientific and Cultural Organization (UNESCO)
Director-General - Irina Bokova, Bulgaria (2009–present)
United Nations High Commissioner for Human Rights
High Commissioner - Prince Zeid bin Ra'ad, Jordan (2014–present)
United Nations High Commissioner for Refugees (UNHCR)
High Commissioner - António Guterres, Portugal (2005–present)
United Nations Industrial Development Organization (UNIDO)
Director-general - Li Yong, China (2013–present)
World Food Programme (WFP)
Executive Director - Ertharin Cousin, United States (2007–present)
World Health Organization (WHO)
Director-General - Margaret Chan, China (2007–present)
World Meteorological Organization (WMO)
President - David Grimes, Canada (2011–present)
Secretary-General - Michel Jarraud, France (2004–present)
World Tourism Organization (UNWTO)
Secretary-General - Taleb Rifai, Jordan (2010–present)
Political and economic organizations
African, Caribbean and Pacific Group of States (ACP) -
Secretary-General - Mohamed Ibn Chambas, Ghana (2010–present)
African Union -
Chairperson - Hailemariam Desalegn, Ethiopia, (2013–present)
Chairperson of the Commission - Nkosazana Dlamini-Zuma, South Africa (2012–present)
President of the Pan-African Parliament - Idriss Ndele Moussa, Chad (2009–present)
Andean Community -
Secretary-General - Adalid Contreras Baspineiro (Bolivia), (2010–present)
Arab League -
Secretary-General - Nabil Elaraby, Egypt (2011–present)
Arab Maghreb Union
Secretary-General - Habib Ben Yahia, Tunisia (2006–present)
Asia-Pacific Economic Cooperation (APEC)
Executive Director - Muhamad Noor, Malaysia (2010–present)
Association of Southeast Asian Nations (ASEAN) -
Secretary-General - Le Luong Minh, Vietnam (2013–present)
Caribbean Community -
Secretary-General - Lolita Applewhaite, Barbados (2011–present)
Central American Parliament -
President - Dorindo Cortéz, Panama (2010–present)
Common Market of East and Southern Africa (COMESA) -
Secretary-General - Sindiso Ngwenya, Zimbabwe (2008–present)
Commonwealth of Nations -
Head - Queen Elizabeth II (1952–present)
Secretary-General - Kamalesh Sharma, India (2008–present)
Commonwealth of Independent States
Executive Secretary - Sergei Lebedev, Russia (2007–present)
Council of Europe
Secretary General - Thorbjørn Jagland, Norway (2009–present)
President of the Parliamentary Assembly of the Council of Europe (PACE) - Mevlüt Çavuşoğlu, Turkey (2010–present)
President of the European Court of Human Rights - Jean-Paul Costa, France (2007–present)
East African Community -
Secretary-General - Richard Sezibera, Rwanda (2011–present)
Economic Community of West African States
President of the Commission - Victor Gbeho, Ghana (2010–present)
Chairman - Alassane Ouattara, Côte d'Ivoire (2012–present)
Eurasian Economic Community
Secretary-General - Tair Mansurov, Khazakstan (2007–present)
Chairman of the Interstate Council - Nursultan Nazarbayev, Kazakhstan (2001–present)
European Free Trade Association
Secretary-General - Kristinn Árnason, Iceland (2012–present)
European Union (EU)
Presidency of the European Council - Herman Van Rompuy (2009–present)
Presidency of the European Union Council
Ireland (2013)
President of the European Commission - José Manuel Barroso, Portugal (2004–present)
President of the European Parliament - Jerzy Buzek, Poland (2010–present)
Secretary-General of the Council and High Representative for the Common Foreign and Security Policy - Catherine Ashton, United Kingdom (2009–present)
President of the European Central Bank - Mario Draghi, Italy (2011–present)
European Ombudsman - Nikiforos Diamandouros, Greece (2003–present)
President of the Committee of the Regions (CoR) - Peter Straub, Germany (2004–present)
President of the European Investment Bank (EIB) - Werner Hoyer, Germany (2012–present)
President of the European Court of Justice (ECJ) - Vassilios Skouris, Greece (2003–present)
President of the European Court of Auditors - Hubert Weber, Austria (2005–present)
President of the Economic and Social Committee (ESC) - Anne-Marie Sigmund, Austria (2004–present)
Group of Eight (G8)
President (informal) - David Cameron, United Kingdom (2013)
Gulf Cooperation Council
Secretary-General - Abdullatif bin Rashid Al Zayani, Bahrain (2011–present)
Ibero-American Secretariat (Segib)
Secretary-General - Enrique V. Iglesias, Uruguay (2005–present)
Indian Ocean Commission
Secretary-General - Monique Andreas Esoavekomandroso, Madagascar (2004–present)
Non-Aligned Movement (NAM)
Chairman - Hassan Rouhani, Iran (2013–present)
Nordic Council
Secretary-General - Jan-Erik Enestam, Finland (2007–2013)
North Atlantic Treaty Organisation
Secretary-General - Anders Fogh Rasmussen, Denmark (2009–present)
Organisation for Economic Co-operation and Development (OECD)
Secretary-General - José Ángel Gurría, Mexico (2006–present)
Organization for Security and Co-operation in Europe (OSCE)
Secretary-General - Lamberto Zannier, Italy (2011–present)
Chairman-in-Office - Audronius Ažubalis, Lithuania (2011–present)
High Commissioner on National Minorities - Knut Vollebæk, Norway (2007–present)
Organization of American States
Secretary-General - José Miguel Insulza, Chile (2005–present)
Organisation of Eastern Caribbean States
Director-General - Len Ishmael, Saint Lucia (2003–present)
Organisation of Islamic Cooperation
Secretary-General - Iyad bin Amin Madani, Saudi Arabia (2014–present)
Pacific Community
Director-General - Jimmie Rodgers, Solomon Islands (2006–present)
Pacific Islands Forum
Secretary-General - Tuiloma Neroni Slade, Samoa (2008–present)
Shanghai Cooperation Organization (SCO)
Secretary-General - Bolat Nurgaliyev, Kazakhstan (2007–present)
South Asian Association for Regional Cooperation
Secretary-General - Ahmed Saleem, Maldives (2012–present)
Southern Cone Common Market (Mercosur)
Director of the Executive Secretariat - Agustín Colombo Sierra, Argentina (2009–present)
Southern African Development Community
Executive Secretary - Stergomena Tax, Tanzania (2013–present)
Union of South American Nations (Unasur/Unasul)
President - Ollanta Humala, Peru (2012–present)
Secretary-General - Alí Rodríguez Araque, Venezuela (2012–present)
Unrepresented Nations and Peoples Organization (UNPO)
Secretary-General - Roberto Azevêdo, Brazil (2013–present)
World Trade Organization (WTO)
Director-General - Roberto Azevêdo, Brazil (2013–present)
Financial organizations
African Development Bank -
President - Donald Kaberuka, Rwanda (2005–present)
Asian Development Bank -
President - Takehiko Nakao, Japan (2013–present)
European Bank for Reconstruction and Development
President - Suma Chakrabarti, India (2012–present)
Inter-American Development Bank (IADB)
President - Luis Alberto Moreno, Colombia (2005–present)
International Monetary Fund
Managing Director - Christine Lagarde, France (2011–present)
Islamic Development Bank (IDB)
President - Ahmad Mohamed Ali, Saudi Arabia (1975–present)
World Bank
President - Jim Yong Kim, United States[1][better source needed] (2012–present)
BRICS Bank
President - KV Kamath, India (2015–present)
Sports organizations
Asian Football Confederation (AFC)
President - Zhang Jilong, China (2011–present)
Confédération Africaine de Football (CAF)
President - Issa Hayatou, Cameroon (1988–present)
Confederation of North, Central American and Caribbean Association Football (CONCACAF)
President - Alfredo Hawit, Honduras (2011–present)
Confederación Sudamericana de Fútbol (CONMEBOL)
President - Eugenio Figueredo, Uruguay (2013–present)
Fédération Internationale des Échecs (FIDE)
President - Kirsan Ilyumzhinov, Russian Federation (1995–present)
Fédération Internationale de Football Association (FIFA)
President - Sepp Blatter, Switzerland (1998–2015)
International Cricket Council (ICC)
President - Zaheer Abbas, Pakistan (2015–present)
International Olympic Committee (IOC)
President - Thomas Bach, Germany (2013–present)
International Paralympic Committee (IPC)
President - Philip Craven, United Kingdom (2001–present)
International Rugby Board (IRB)
President - Bernard Lapasset, France (2008–present)
Oceania Football Confederation (OFC)
President - David Chung, Malaysia/Papua New Guinea (2010–present)
Union of European Football Associations (UEFA)
President - Michel Platini, France (2007–present)
Other organizations
Antarctic Treaty
Executive Secretary - Jan Huber, Netherlands (2004–present)
Colombo Plan -
Acting Secretary-General - Mr Tay Bian How, Malaysia (December 2013 - present)
Community of Portuguese Language Countries (CPLP)
Executive Secretary - Murade Isaac Miguigy Murargy, Mozambique (2012–present)
EDU - Intergovernmental Organization (EDU)
Secretary-General - G.Irving Levance, (2011–present)[2]
La Francophonie
Secretary-General - Abdou Diouf, Senegal (2003–present)
Intergovernmental Authority on Development (IGAD)
Executive Secretary - Mahboub Maalim, Kenya (2008–present)
International Committee of the Red Cross
President - Peter Maurer, Switzerland (2012–present)
International Court of Justice
President - Hisashi Owada, Japan (2009–present)
International Criminal Court
President - Song Sang-Hyun, South Korea (2009–present)
International Criminal Police Organization (Interpol)
Secretary-General - Ronald Noble, United States (2000–present)
President - Mireille Ballestrazzi, France (2012–present)
International Federation of Red Cross and Red Crescent Societies
President - Tadateru Konoé, Japan (2009–present)
International Maritime Organization
Secretary-General - Koji Sekimizu, Japan (2012–present)
International Organization for Migration (IOM)
Director-general - William Lacy Swing, United States (2008–present)
International Telecommunication Union
Secretary-General - Hamadoun Touré, Mali (2007–present)
Organisation for the Prohibition of Chemical Weapons (OPCW)
Director-General - Ahmet Üzümcü, Turkey (2010–present)
Organization of Petroleum Exporting Countries (OPEC)
Secretary-General - Mohammed S. Barkindo, Nigeria, acting for Daukoru (2006–present)
Universal Postal Union
Director-General - Édouard Dayan, France (2005–present)
World Intellectual Property Organization (WIPO)
Director-General - Francis Gurry (2008–present)

WHO'S WHO?

NATO (The North Atlantic Treaty Organization)
is an intergovernmental military alliance based on the North Atlantic Treaty which was signed on 4 April 1949.

NATO Secretary General:
The Secretary General is the Alliance’s top international civil servant. This person is responsible for steering the process of consultation and decision-making in the Alliance and ensuring that decisions are implemented.

The current NATO Secretary General is Jens Stoltenberg.
The current NATO Deputy Secretary General is Amb. Alexander Vershbow

Previous Secretaries General of NATO
NATO Secretary General Anders Fogh Rasmussen
2009 - 2014
NATO Secretary General Jaap de Hoop Scheffer
2004 - 2009
NATO Secretary General, The Rt. Hon. Lord Robertson of Port Ellen
1999 - 2003
NATO Secretary General Javier Solana
1995 - 1999
NATO Secretary General Willy Claes
1994 - 1995
NATO Secretary General Manfred Wörner
1988 - 1994
NATO Secretary General Lord Carrington
1984 - 1988
NATO Secretary General Joseph Luns
1971 - 1984
NATO Secretary General Manlio Brosio
1964 - 1971
NATO Secretary General Dirk U. Stikker
1961 - 1964
NATO Secretary General Paul-Henri Spaak
1957 - 1961
NATO Secretary General, Lord Ismay
1952 - 1957

Senior Civilian & Special Representatives:
*The Incumbent NATO Senior Civilian Representative in AFGHANISTAN is Ismail Aramaz
*The current NATO Secretary General’s Special Representative for the Caucasus and Central Asia is James Appathurai
*The current NATO Secretary General's Special Representative for Women, Peace and Security is Marriët Schuurman

The current Chairman of the Military Committee is General Petr Pavel.



References:
https://en.wikipedia.org/wiki/List_o...eaders_in_2015
https://en.wikipedia.org/wiki/NATO
http://www.nato.int/cps/en/natohq/who_is_who.htm