Purpose: The aim of this paper is to propose a model for international harmonization of the training and qualification of human resources for industrial professions. The outcome is a system based on training guidelines and a quality assurance methodology that is now in use in 42 countries around the world. Design/methodology/approach: The paper describes the motivations that led to the development of the International System for the Training and Qualification of Welding Personnel. The structure of this system and the documents on which it is based are outlined. Findings: The approach used has gained wide international acceptance. The progress achieved is analysed in the final part of the paper. More than 150,000 qualifications have so far been awarded around the world. Practical implications: The need for a harmonized International System for the Training and Qualification of Welding Personnel has been recognized by industry and the authorities. The reference to this system in international standards and the general recognition of its reliability by stake holders is leading to its widespread use in more countries and by more professionals. Originality/value: The harmonized international system for the qualification of human resources in welding technology is unique in Europe. The methodology used has proved to be successful and can be benchmarked for application in human resources development for other professions. (Contains 5 figures.)