Present positions:

Professor of Optimization and Systems Theory,  Royal Institute of Technology, Stockholm, Sweden (appointed 1982)

Chairman, Department of Mathematics, Royal Institute of Technology, Stockholm, Sweden (pointed 2000)

Affiliate Professor of Optimization and Systems Theory, Washington University, St. Louis, USA (appointed July 1989)

Previous positions:

Professor, University of Kentucky, 1980 - 1984

Associate Professor, University of Kentucky, 1974 - 1980

Associate Professor (Research), Brown University, 1973

Assistant Professor, University of Florida, 1972 -1973

Docent, Royal Institute of Technology, 1972

Researcher, Swedish Institute of National Defence, 1967 - 1968

Various teaching and research positions at the Royal Institute of Technology and at the Universities of Stockholm, Uppsala and Lund, 1968--1972