Dariusz Jemielniak is a Wikipedian, Full Professor of Management at Kozminski University, and an entrepreneur (having established the largest online dictionary in Poland, ling.pl, among others).
Dariusz currently serves on Wikimedia Foundation Board of Trustees. In his academic life, he studies open collaboration movement (in 2014 he published "Common Knowledge? An Ethnography of Wikipedia" with Stanford University Press), media files sharing practices (among lawyers and free knowledge activists), as well as political memes' communities.
He had visiting appointments at Cornell University (2004-2005), Harvard (2007, 2011-2012), and University of California, Berkeley (2008), where he studied software engineers' workplace culture.