I'd be careful with packing a blade like that. I know that where I work, showing up with that on your person would earn you a written reprimand and maybe a few days off.
Lord help you if you ever displayed or made any gestures with it in a "violent" situation. Termination for sure.
I have worked in some sketchy areas and some of my districts are not very nice, but I never felt the need to carry a weapon like a machete.
My chief(s) knew I had it. I gave them the explanation why, and basically discussed reasons in which it was proper to use it, which would be, solely and only, situations that proved to be a life threat to me or my partner(s), that I would be unable to get out of. Any other reasons for it, as you said, would be grounds for termination.