National and Kapodistrian University of Athens, külalisprofessor 01.01.2023-
Institute of Environmental Science and Technology, Autonomous University of Barcelona, Külalisprofessor (0,20) 01.09.2018–
ETH Zurich, Külalisteadur (0,05) 01.09.2018–30.08.2019
Harvard University, Berkman Klein Center for Internet and Society (0,10) 01.09.2017–...
Commons Transition Group, Teadur (0,10) 01.01.2014–...
P2P Lab, Research Hub (0,50) 01.01.2013–...
Institute of Environmental Science and Technology, Autonomous University of Barcelona, Külalisdotsent (0,10) 01.04.2016–01.04.2018
Department of Social and Cultural Anthropology, VU University Amsterdam, Külalisteadur (0,10) 01.04.2016–31.12.2017
Greek Government, Office of the Deputy Prime Minister for Technology Governance, (0,10) 01.02.2016–01.07.2016
Bitmind.co, Building a Toolkit for Open Value Networks (0,20) 01.09.2015–30.08.2018
Greek Government, Office of the Prime Minister for ICT and E-governance (0,30) 01.01.2009–31.12.2010
Foundation for the Peer-to-Peer Alternatives (P2P Foundation), Research Coordinator (0,30) 01.09.2007–01.02.2017