Could you define your question after this?

We have non-pilot ground instructors. We use Sim-P's which (whom) are non-AA pilots. The saying used to be you had to be 72 years old or older to be a Sim-P.

We only use Check Airmen for the checkrides in Sim's.
For recurrent:
1 warm up sim with a Non-AA pilot Sim-P.
Checkride with a AA check Airman.

Long training. 1 week sim with Sim-P and last 1 week with a real AA check Airman.


I think your real question is: If you become a check airman, does your seniority continue to accrue?

Yes.

I hope I answered your question.