What industry are you in Carrickman? Is there a reason why these companies (for whom presumably your employer is providing a service) would need to know the qualifications of their "competent person" for safety (presumably you?)

For example if you are a construction contractor providing services for a client then they have every reason to ask about your qualifications to manage safety. I don't think this necessarily means your full CV though - simply your competence to perform the services they are seeking to engage. I would simply provide a short summary of your qualifications and experience that demonstrates this competence.