The nuclear security culture workshop focuses on the human dimension in security at nuclear and radiological facilities, examining the impact of security culture on the effectiveness of physical security systems. Security culture is one of the most complex and interdisciplinary areas of nuclear security and, consequently, also one of the most misunderstood – even despite the increase of international interest and activities in this area. This five-day workshop introduces the concept of security culture, examining the IAEA guidance in this area which builds upon Edgar Schein’s work on broader organisational culture. It also discusses approaches, methods and tools for the assessment of security culture, as well as the insider threat and human dimension in cyber security.