I suggest: PE teacher for all levels of secondary school
In 'Notebook 'onderwijstermen' they call it a 'grade one teaching qualification'
In Nuffic:
eerstegraads onderwijsbevoegdheid
teaching qualification, first level
This is the highest teaching qualification in the Netherlands, granted upon completion of a university programme of teacher training (ULO). The holder is qualified to teach one subject at all levels of general secondary education and vocational education. It is intended primarily for teachers of the final years of HAVO and VWO.

Because a literal translation of the term eerstegraads (first level) offers little information for readers who are not familiar with the Dutch teaching qualifications framework, it is extremely helpful to offer readers explanatory information, such as "The holder of this diploma has qualified teacher status in the Netherlands for teaching the named subjects in all years and all types of secondary education.".