Approved Training Organisations 

ATOApproved Training Organisation – refers to an organisation (a legal entity) that has been assessed against the criteria in CEN ISO/TR 25108 and approved by BINDT to provide specified training courses for personnel intending to attempt a PCN or other specified examination.

CEN ISO/TR 25108: 2006 – ‘Non-destructive testing – Guidelines for NDT personnel training organisations’ (ISO/TR 25108: 2006) is an International Technical Report (TR). It provides guidance for training organisations on management, the quality management system (QMS), student induction and assessment, facilities, NDT equipment, technical library, training staff and records to be maintained.

For a list of ATOs see:

What the hec?! articles are not intended to be the definitive account on the topic or acronym in question. Readers’ comments and contributions are welcomed. Email: