Aatos Heikkinen is a computational physics graduate from the University of Helsinki.  Since 1998 he was a member of the Geant4 collaboration, where he specialized to modeling of intra-nuclear cascades, and acted as a Geant4 Hadronic physics group coordinator. Furthermore, he was a member of the Compact Muon Solenoid collaboration, where he developed software for detector simulation and techniques for multivariate data analysis. Currently, he works as a research manager in a Finnish maritime company Eniram Ltd.