Kjell Aleklett is Professor of Physics at Uppsala University in Sweden where he leads the Uppsala Global Energy Systems Group (UGES). He holds a doctorate in nuclear physics from the University of Gothenburg, Sweden, and worked as a postdoctoral fellow and staff scientist from 1977 to 1985 at the Natural Science Laboratory at Studsvik, Sweden.
Together with Colin Campbell he organised the First International Workshop on Oil Depletion in May 2002 at Uppsala University. It was in connection with this workshop that ASPO, the Association for the Study of Peak Oil & Gas, was established. Since 2003 he has been president of ASPO International.