Ms. Esterhuysen currently serves as a Commissioner on the Global Commission on the Stability of Cyberspace. She was the executive director of the Association for Progressive Communications (APC) - the largest ICT-focused civil society network in the world - from 2000 to 2016. She continues to work with APC as a consultant and convenes the African School on Internet Governance (AfriSIG) a joint initiative of APC, the African Union Commission and Research ICT Africa. Ms. Esterhuysen has served on the African Technical Advisory Committee of the United Nations Economic Commission for Africa's African Information Society Initiative (1996-1999), the United Nations ICT Task Force (2002-2005), the World Summit on the Information Society (WSIS) Working Group on Financing Mechanisms (2003-2005), the Commission on Science and Technology for Development Working Group on Internet Governance Forum (IGF) Improvements (2011-2012) and on Enhanced Cooperation (2017-2018), the Global Commission on Internet Governance and the Multistakeholder Advisory Group (MAG) of the IGF (2012-2014). She was inducted into the Internet Hall of Fame as a Global Connecter in 2013.