- Senior Scientist, VTT Technical Research Centre of Finland, January 2013 - present.
- Research Scientist, VTT Technical Research Centre of Finland, April 2012 - December 2012.
- Visiting Scholar, University of Electro-Communications, Japan, June 2017 - August 2017.
- Visiting Scholar, University of Houston, USA, March 2016 - April 2016.
- Visiting Student, University of York, UK, August 2010 - November 2010.