I have been at the Department of Mathematics at Linköping University since 1979, first as doctoral student, then as associate professor (1986) and senior associate professor (docent, 1993), and since 2007 as full professor.

A large portion of my basic research has been devoted to questions related to decomposition methods for mathematical optimization, but I have also made contributions within nonlinear and discrete optimization. My earlier applied research lies mostly in the intersection between optimization and traffic planning, in optimal design, in staff scheduling, and in asset liability management. My current research interests are primarily within decomposition methods and discrete optimization, as well as applications of optimization and operations research within various areas, and in particular within radiation therapy.

Altogether I have published over 110 articles in international journals, peer-reviewed conference proceedings, or peer-reviewed book chapters. I have been the main supervisor for ten doctoral dissertations, and in total I have supervised 17 doctoral dissertations and 16 licentiate theses, as main or assistant supervisor. (The Swedish licentiate degree is halfway between the master's and doctoral degrees.) Four of my former doctoral students (Michael Patriksson, Clas Rydergren, Mikael Rönnqvist, and Ann-Brith Strömberg) have become full professors and one (Elina Rönnberg) is senior associate professor (docent). I have as main applicant received five research project grants from the Swedish Reserch Council (2002-03, 2006-08, 2016-19, 2020-23, and 2024-27).