While there are still some uncertainties, it looks like I have at least identified the mountain range in question.
The current plan is to split my time between teaching and researching in Tallinn University of Technology (Estonia) and University of Jyväskylä (Finland), with 25% of my time left for various projects that I can pursue in self-employed mode (ideas welcome). The switch is going to happen in the next few months and should be complete by the end of the year.
I will still focus on cyber conflict and national cyber security research, so that is not going to change. However, I hope to tie my current research with a different field or approach, such as AI or situational awareness, in order to cover interesting new ground. I am not set on a topic yet and will explore cooperation opportunities as they develop.