I don't think I've ever seen it mentioned straight out anywhere besides here and Sailor Nothing, but clearly this must be the usual case, seeing how magical girls are never recognized despite almost always looking the same as usual, just with different clothes.
Mahou Shoujo Spec-Ops Asuka. There again, she went and blew her cover at the first opportunity.
I don't even think a job is what Neeko needs right now. Her lack of self-confidence will be self-fulfilling and she'll screw up, reinforcing her bad beliefs.