Chalmersi Tehnikaülikool, professor 01.01.2001–...
Chalmersi Tehnikaülikool, Fiber Optic Communication Research Center, direktor 2010-2020
Lehigh University (Bethlehem, Pennsylvania), külalisprofessor 01.01.2003–31.12.2004
Cenix Inc. (Allentown, Pennsylvania), director of research 01.01.2000–31.12.2003
Chalmersi Tehnikaülikool, associate professor 01.01.1995–31.12.2001
Chalmersi Tehnikaülikool, Head of fiber optic communication group, 1992-2015
Chalmersi Tehnikaülikool, assistant professor 01.01.1992–31.12.1995
AT&T Bell Laboratories, post-doctoral fellow 01.01.1989–31.12.1992
Chalmersi Tehnikaülikool, research associate 01.01.1988–31.12.1989