DSB's general purpose is to protect Norway and its citizens from accidents, disasters, and other incidents.

Examples of areas of responsibility for the DSB include prevention, crisis management, studies and analysis, civil/military cooperation, training, evaluation, and supervision.

In addition, civil defense is subject to regulation by the DSB, as is cyber security.

[1] The DSB is also involved in international crisis coordination groups.

The DSB has about 670 employees, of whom about 240 are based at the main office in Tønsberg.