Diving and cave exploration:
2010 Joined Finnish Caving Association and Turku YMCA dive club
2010-2015 Various certifications including but not limited to: NAUI scuba diving assistant instructor, NAUI Trimix Gas Blender, TDI Trimix diver, PSAI Full Cave Diver, Finnish diving federation certified body recovery diver. And single rope technique climbing for caves certification (speleo.se).
2014-2022 Finnish Caving Society board member and training officer
About 350 days (7hrs/trip) of diving done as of Sept. 2022.
2013-2015 Writer in Sukeltajan maailma, a Finnish diving magazine.
2013-2016 Writer in the Finnish Caving Society journal and in the journal of Sveriges Speleologförbund
2017-2022 Editor-in-chief of the annual journal of the Finnish Caving Society.
2019-2022 Webmaster for Sukellushistoriallinenyhdistys.fi - built from scratch, secured and populated with articles. A lot of research in diving history done.
2015 Coursera: Bitcoin and Cryptocurrency Technologies (nondegree online course by Princeton university)
2017 autumn: TUCS block chain seminar
2017 Founding member of the Turku information security society TurkuSec ry
2017-2022 Board member of TurkuSec ry