FWIW, I was job hunting a number of years ago and had a job interview during either Sefirah or the three weeks (I don’t recall which now). I asked and was told that I should shave — and that was in tech, where being clean-shaven is not nearly as standard as in accounting.
Of course, keep in mind that my rav then (who is not my rav now) is (probably) not your rav, my situation is not yours and my p’sak is not yours.
The Wolf