If you wish to work as a certified structural engineer on construction projects in Denmark, you must have a certification issued by an accredited certification body.
The accredited certification body, Dancert, has established procedures for the certification of persons seeking recognition. You can read more the procedures here.
You can apply for certification by submitting the application form, together with the documentation that verify your qualifications and competencies via Dancert’s website (which you'll find via the "Start"-button).
If you apply for certification of structure class 3, 4, and third-party control, your application must come with project documentation.