1978-79

Research engineer, Philips Research and Development laboratories, Eindhoven, The Netherlands

1980

Lecturer, Department of Mathematics, HUT

1980-83

Research assistant, Academy of Finland

1983-85

Assistant, Department of Mathematics, HUT

1985-86

Acting associate professor in Computer Science and Operations Research, The Swedish School of Economics and Business Administration, Helsinki

1986-90

Junior and senior research fellow, Academy of Finland

1990-92

Senior assistant, Department of Solid Mechanics, HUT

1992-95

Senior research fellow, Academy of Finland

1995-96

Senior assistant, Department of Solid Mechanics, HUT

1996-99

Professor of Numerical Analysis (Numerik und Bauinformatik), University of Innsbruck, Austria

1999-2001

Professor of Mathematics, Tampere University of Technology

 2001-

Professor of Mechanics, Helsinki University of Technology

1975-77

Teaching assistant, Department of Mathematics, HUT

1986-87

Teaching assistant, Department of Structural Mechanics, HUT

1987-

Docent in Applied Mathematics, Jyväskylä University

1991

Lecturer, Department of Structural Mechanics, HUT

1990, 1992

Lecturer, The Finnish National Graduate School in Mechanics

1993-2001

Docent in Computational Solid Mechanics, HUT

1987-89

Insitut National de Recherche en Informatique et en Automatique (INRIA), Roquencourt, France (16 months)

1989

Laboratorio National de Computacao Cientifica, Rio de Janeiro (2 months)

1989

Department of Mathematics, University of Maryland, College Park (4 months)

1992, 1994-95

INRIA-Roquencourt, France (1 and 6 months)