The International Institute of Welding is an Association under the 1901 French law. The General Assembly is the governing instance with delegations of powers to the President and Board of Directors. The operational management is assured by the General Secretariat.
The IIW gathers 26 Technical Commissions and 4 Select Committees. Working Groups have the responsibilities to develop certain aspects of the IIW Activity. The Qualification and Certification is managed by the International Authorization Board (IAB) having its own Secretariat.