When I was growing up, we had a regular postman who came every day for many years. He always had his German Shepherd with him.
It was a nice, regular presence in the neighborhood.
I was a summer carrier during college and the first two years of medical school, except my summer after college which was an Affirmative Action year for the Federal government.
The only job I ever had that was 8.5 hours on the clock that could be done in 3-4 hours.