2003 - , Head of Physics Section, Science Institute 1987 - , Professor, University of Iceland 1991 - 1999, Head of Physics Section, Science Institute 1986 - 1986, Research associate (forskare), University of Linköping 1984 - 1986, Research associate, Lehigh University 1983 - 1984, Research associate (forskare), University of Linköping 1982 - 1983, Research associate (forskningsassistent), University of Lund
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