The IEA does not itself directly certify HFE professionals but endorses the certification systems of federated society members around the world. All IEA endorsed certification bodies must base the education and experience of certified professional level HFE specialists on the Core Competencies in Human Factors and Ergonomics 2021. Additionally the IEA requires that all certified HFE practitioners have signed a Code of Conduct. The IEA Code of Conduct is available here as a model.
A list of all IEA endorsed and recognised certification bodies can be found here.
The complete criteria for IEA endorsement of certification systems can be found here.
A video on certification can be seen by selecting the grey square below (Presented by Dr Maggie Graf at the IEA2021 Congress),