I don't on my QV crew as of about 2 weeks ago, but my Kaiser crew is short on 3 of my 4 reps.
That said, I don't use Kaiser except in BB1-6 rooms and HA so my KM crew gets no XP... I
also prefer Engine OH Time and Speed to repair so if I do use something lower tier, I
always use 4 Engys and fill up the rest with Reps.