What PUBLIC occupation requires the thickest skin? Who do you believe is most professional & objective? Why?

What about private jobs? Some private jobs to consider:

Security

Live in staff (babysitter, au pair, chef, chauffer);

Bouncers

Flight attendants

Wedding planners

Umpires / referee

Any retail job

Uber drivers

Cops
Nurses
Teachers
Corrections
Parking enforcement
Social workers
Some other public occupation.
Select gender and age to cast your vote:
What PUBLIC occupation requires the thickest skin? Who do you believe is most professional & objective? Why?
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