His opponent was John Breslin, from the National University of Ireland, Galway. John did an excellent work, with both overarching life-as-a-phd-students-questions as well as down to detail technical questions. Hannes seemed to be relaxed and prepared to answer.
Other honorable persons involved:
Main supervisor: Marko Turpeinen
Second supervisor: Ambjörn Naeve
Grading committee: Åsa Smedberg, DSV/SU, Marcelo Milrad, Linnaeus university, and Teemu Leinonen, Aalto University