Hans Moerbeek successfully defended his Master thesis on promoting the principles of learning organizations within the Surveillance and Security Department of the Ministry of Defence (DBBO). Using theories of the learning organisation Hans mapped measures introduced before and their effects on working processes and results. Subsequently a critical incident method was used to describe the learning processes which take place within work processes. Several barriers were found to really achieve an open learning mindset in this action-oriented organization. A selection was made of these barriers, and interventions which were going on were improved and the efficacy of these interventions for working processes and results was studied. Further research is necessary to further develop targeted interventions to collectively grow to an organization in which reflection on action is practiced in full. Congratulations to Hans, and thanks to Dr. Joachim Wetterling for the assessment of the thesis.