We are a small shop 13 people. We hold ISO 9001:2015, AS 9100:2016 and ISO/TS 16949:2009. During our upgrade to IATF 16919:2016 the only finding was there was no external training certification for internal auditors. I cannot find anywhere that states that - just demonstrate competency. Why can't we do this internally? Why must we spend thousands to get training when we have the competence to do it via self study internally?
The standard does not require external training for internal auditors or certifications. All the standard requires is for training to be conducted by competent trainer and for organization to maintain records on the trainer competency.
The trainer competency can be demonstrated either through various relevant certificates the trainer possesses, or by work experience that qualifies the trainer to perform the training.