[raydev]

Sure, why not?

The key is that if it requires some sort of certification, as Canada claims it does, then it should be a modifier/adjective on the title like "certified janitor" or "licensed engineer".

Just claiming an existing single common noun as an exclusive term belonging to your organization is clearly an untenable position. If you have to keep reminding everyone that they're infringing on your trademark all the time by using a common word, you've already lost.

[entropyie]

For reference, here are the standards expected from an "IT Engineer" in Ireland (PDF): https://www.engineersireland.ie/LinkClick.aspx?fileticket=jp...

[entropyie]

Agreed. In Ireland the term would be "Chartered Engineer". Pretty clear I would say.