The THW is a federal agency within the portfolio of the Federal Ministry of the Interior, founded in 1950 and headquartered in Bonn. Its purpose is technical assistance: when a flood, storm, major accident or failure of infrastructure overwhelms local capacities, THW units can provide equipment and expertise — pumping, lighting, emergency power, bridge-building, water treatment, debris clearance or logistics. It also supports humanitarian operations abroad at the request of the federal government.
What makes the THW distinctive is its staffing. According to the agency, around 88,000 volunteers make up roughly 98 per cent of its members; only about two per cent — some 2,200 people — are full-time employees. Volunteers are organised in 669 local sections (Ortsverbände) across the country, supported by 66 regional offices, eight regional associations (Landesverbände) and training centres. The THW youth organisation counts around 17,000 young members.
Within Germany's civil protection system the THW is a supporting force. In peacetime, disaster management is primarily the responsibility of the sixteen Länder and their local authorities; the federal government is responsible for civil protection in a defence situation. The THW is typically deployed when the responsible authorities request assistance — it does not take over command of an incident. That division of labour is one reason why cooperation between federal, state and local levels is a constant theme in German debates about crisis readiness.