Eurgeol Alecos Demetriades has more than 40 years experience in Applied Geochemistry. He has worked at Rio Tinto Finance and Exploration Limited (1972-1973) as a researcher for the compilation of a global mineral deposits inventory, and as a consultant and trainer in applied geochemistry for mineral exploration purposes (1990 and 1997-1998).

Since, 1976 he has worked at the Hellenic Institute of Geology and Mineral Exploration (I.G.M.E.) as a geologist-applied geochemist and managed many exploration geochemical and environmental geochemistry projects. From April 2009 until his resignation in November 2011, he held the post of Director of the I.G.M.E. Division of Geochemistry and Environment.  Since 1986, he represented I.G.M.E. in different geochemistry groups of the former Western European Geological Surveys (WEGS) and Forum of European Geological Surveys (FOREGS) and currently EuroGeoSurveys; he is still an active member of the EuroGeoSurveys Geochemistry Expert Group.

He holds the post of treasurer to the IUGS Commission on Global Geochemical Baselines, and the chair of the Sampling Committee.  He is a member of the IUGS Group on Resourcing Future Generations, and National Focal Point for Hellas of the Earth Science Matters Organisation; Councillor to the Governing Board and Scientific Committee member of the UNESCO International Centre on Global-Scale Geochemistry.

He is author to more than ninety publications, co-editor of European Geochemical Atlases and of a textbook on urban geochemistry, an Associate Editor of the Journal of Geochemical Exploration and Geologia Croatica, and a reviewer to many other geoscientific journals.