Japanese to English Law/Patents Certificates, Diplomas, Licenses, CVs

I am translating the graduation certificate of a professional training college (専門学校).

It is well known among those familiar with the subject that 専門士 was traditionally translated as "Technical Associate" but it was changed to "Diploma" because "Diploma" is a more widely-recognized term overseas (Japan Government says). Nowadays, the term "Technical Associate", it seems, is not used for any academic title in Japan.

Now, as far as I have researched, everybody is copying and pasting that [専門士（○○課程）] should be translated as:
- Diploma (Post secondary Course (○○))
or
- Diploma in ○○
but it doesn't make sense to me, because diploma refers to the document (the paper) and 専門士 is the title that a person is being granted by receiving it. In many situations (like in my case) you may have to differentiate between these two.

I researched more and learned that 専門士 simply does not have an equivalent in English. So, the most reasonable translation I found was this:
... award this Certificate and grant him/her the title of Senmonshi (Diploma in XX)

But now, consider the reason why "Technical Associate" was abolished. So, do you think that Senmonshi is more familiar to the world?

Since the term "Technical Associate" is in disuse, I thought about this:
... award this Certificate and grant him/her the title of Technical Associate with a Diploma in XX
but maybe it is too daring. Maybe the advantage of Senmonshi is that it does not lead to misunderstandings.

So what do you think? Do you think I should bring the term "Technical Associate" back to life?, or just stick to Senmonshi to avoid any misunderstandings and still keep the difference between the document and the title being granted?, or do you have another candidate?

Looking forward to your feedback. Thank you.