Aron Wolf (Willy) Siegel was born on the 25th of November 1956 in Amsterdam and emigrated in 1969 to Israel. He started his bachelor’s degree in aeronautical engineering in 1976 at the Technion in Haifa. Siegel graduated cum laude in 1979, after which he joined the Israeli Airforce, as aeronautical software engineer and thereafter as department head, developing and implementing F-16 Avionics algorithms and human machine interfaces (HMI). In 1986 he started his master’s degree in aerospace engineering at the Technion, specializing in Optimal control, Differential games, and Artificial intelligence. During his master’s study, Siegel was assistant in Numerical analysis. He defended his master’s thesis in 1989. After returning to the Netherlands he worked at different companies, among which Fokker Space & Systems, IBM consulting group, Movares/InTraffic and ProRail, as a lead engineer, architect, consultant and project manager, innovating and developing IT-systems in the area of aerospace, robotics, simulators, transportation and rail. Before starting his Ph.D. program in 2013, at the faculty of Behavioural, Management and Social sciences at the University of Twente, he worked for more than 10 years in the rail industry, developing and realizing innovative real-time systems. In 2015 Siegel took place in the board of directors of the Levi Lassen foundation, which donates to philanthropic projects in the Netherlands and Israel. From 2017 dr. Siegel operates as consultant and project manager. In 2018 dr. Siegel started research at the Reinier de Graaf hospital on the usage of wearbles in a clinical setting of elderly (75+) hip fracture patients (see https://Dawny.nl).