Our clients

Calliope has worked with hundreds of clients of all types, across all industries, and around the world. Here is just a selection of them. 

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HABITAT III Conference

  • Side events on City Management, 2016, Quito, Ecuador

Head Tennis

  • Product Launch, 2017, Munich, Germany

Hellenic Ministry of Foreign Affairs

  • Conference of South EU States (G7)

Hellenic Parliament

  • Inter-Parliamentary Conference for the Common Foreign and Security Policy, 2014, Athens

Hewlett Packard

  • Brazilian Delegation Executive Visit, 2015, San Jose, CA

Hilti Group

  • Employee Town Hall Meetings, 2015, Schaan, Liechtenstein


  • Macroeconomic Forum, regular client, Shanghai


  • Huawei P30 Series Launch, 2019, Paris, France

IATA International Air Transport Association

  • 72nd AGM, 2016, Dublin, Ireland

IBF/European Commission

  • EU & Canada as strategic Partners, 2016, Ottawa, Canada


  • Visit to China by IBM Board of Directors, 2012, Shanghai, Beijing
  • Visit of IBM's Global Chairman, President & CEO, 2016, Beijing, China


  • Global Aviation Cooperation Symposium, 2017, Athens, Greece


  • ICLEI World Conference 2018, Montreal, Canada

Ideas Media Group

  • UNICEF V International Seminar on Social Investment, 2017, Buenos Aires, Argentina


  • 8th Annual Meeting, 2016, Copenhagen, Denmark


  • Visit, Credit Agricole Directors, Tel Aviv, Jerusalem, Haifa, Israel


  • ARCO (International Fair of Contemporary Art), 2016, Lisbon, Portugal

IFIT: Institute for Integrated Transitions

  • Transition Assistance for Syria, 2019, Brussels, Belgium

Intel Software de Argentina

  • Use of Technology in the Health & Education Sectors, 2015, Buenos Aires, Argentina

Inter-American Court of Human Rights

  • LVII Special Session, 2017, Guatemala City, Guatemala
  • CXVII Regular Session, 2017, San José, Costa Rica