 Following a position as a research associate at Stanford University 1974–1975 and a position as an Associate Professor (Docent) in Control Theory at Lund University in 1975–1976, Lennart Ljung was elected as a Professor in the Chair of Control Theory at Linköping University in 1976.He was a visiting researcher at Stanford University 1980–1981 and at Massachusetts Institute of Technology 1985–1986.He was also Department Head of the Department of Electrical Engineering, Linköping University between 1981 and 1990.