Author of 230 papers and 5 books in the field of Earth and Planetary Science, High-pressure Physics and Materials Science.
Editor of several volumes of Advances in Physical Geochemistry and other books.
Member of the Royal Swedish Academy of Sciences, 1994. (The academy is the home of several committees which award many prestigious prizes, including the Nobel prize)
La Laurea Ad Honorem in Scienze Geologiche, Padova University, Italy, 2001.
1999- Professor and Director, Center for Study of Matter at Extreme Conditions Florida International University , Miami , Florida and Co-director of the Advanced Materials Engineering Research Institute.
1989- 2001: Professor and chair, University of Uppsala , Uppsala , Sweden .
1983- 1996: Professor, Graduate Center of the City University of New York .
1971-1972: Research associate, Virginia Polytechnic Institute and State University .
1969-1971: Senior Research Associate, National Academy of Science, at Goddard Space Flight Greenbelt , NASA, Maryland
1968-1969: Research scientist, Institute of Mineralogy and Geology, Uppsala .
1967-1969: Assistant Professor, Institute of Mineralogy and Geology, Uppsala