Someone who signs off a minor mod is an Engineer?
I guess my Mom is a doctor then. She's great at affixing bandages....
I'm not sure how it works in your particular country, but here in Canada, aircraft maintenance personnel are allowed to sign off minor modifications in accordance with "acceptable" data. Acceptable data (as defined by the CARS) is not approved data. So that whole argument of "tech equals engineer because he performs engineer functions" doesn't hold water here. I assume your airworthiness system is similarily administered?