WELDTECH
That is a bit better, I will use AWS D1.1 as the code and Clause 1.4.2 to tell you, if I were you I would retest.
If the employee had been tested 7 years ago by you or your representative and had been performing satisfactorily in the process qualified there would be no reason for retesting just for the record. (We have personnel here in the shop qualified over ten years ago by testing and have not tested since. They are Qualified today just as much as they were the day after they took their test.)
But since you the employer cannot say for a fact the test even took place, (because you or your representative weren't there then) you should give a test, this would not be a retest as far as you are concerned because they haven't been qualified by you .
Testing needlessly is a waste.
The personnel here that I mentioned earlier, if were to take a test again, would fair better than the first time they took it.
They have been practicing for over ten years now and they have gotten better not worse, if they had been doing worse they would have been re-tested by now.
But again just my ΒΆΒΆ's
Good Luck
Marshall