Kim Holmberg is a research associate at the Research Unit for the Sociology of Education at the University of Turku, Finland, where he works on questions related to bibliometrics, altmetrics, open science and social media. He is also an Honorary Research Fellow at the Statistical Cybermetrics Research Group at the University of Wolverhampton, UK, and an Adjunct Professor at Åbo Akademi University, Finland. His academic background includes periods as a postdoc researcher at the University of Wolverhampton, UK, and at the VU University Amsterdam, The Netherlands. He has worked on topics such as hyperlink networks, climate change communications in social media, disciplinary differences in online scholarly communication, and educational use of virtual environments. Recently his research has focused on investigating the meaning and validity of altmetrics.