Professor of Urban and Population Geography in the University of Tartu
He is among the top cited researches in the field of urban studies in Eastern Europe. Tammaru has been researcher or lecturer at the University of Tartu, University of Helsinki (Finland), University of Utah (USA), Umea University (Sweden) and Delft University of Technology (The Netherlands). He has PhD in Human Geography from the University of Tartu. He has published numerous publications.