I was Air Force....The only WO I can recall ever seeing was at Sheppard AFB, TX. The WO conducted the "Band of the OilBelt."
In my entire career I only came across one AF Warrant Officer on active duty. I was going through tech school at Chanute and he was in charge of the school.
I had the pleasure to serve under two, a CWO-2 and A CWO-4. Two of the finest men I have met!