For the years 1960 to 1965, he studied economics at the Wolfgang Goethe University of Frankfurt and Sociology at the Institute for Social Research.
[1] After his studies, he began working in the marketing department of the fruit import company "Atlanta Handelsgesellschaft Harder & Co.", in Munich.
[2] In April 1967, Soulas co-founded with other Greek people living in Munich, the "Panhellenic Anti-junta Association" against the 1967-1974 military regime of Greece.
Estimating that photojournalism had still not matured in Greece, he decided to quit working as a professional photographer and he turned toward business and trade.
In 2008, the Museum organized a retrospective exhibition on the work of Dimitris Soulas which was shown in many European cities.