It's a pretty dysfunctional place to work at , I wasn't a carrier, I was a mailhandler.
I started as a PTF ( part-time flexible around 1997 or 1998, back then part-time was 50-60 hours a week, about 1998 I made FTR ( full time regular ), this gives you a defined shift like 11 pm, 2300 in postalese to 0700 , off Tuesday and Friday for example.
You then bid on jobs as openings occur, seniority rules.
Mailhandler are typically level 4, I wound up being the one level 5 lead mailhandler in short time, pays maybe 60 cents per hour than level 4. The only reason I got the position is because the job sucks and nobody senior to me wanted the responsibilities that go along with it.
I was a total paper tiger, I'm like 36 and in charge of guys that are largely Vietnam era Navy and Army 20 year veterans, I have no authority and they damn well know it, once you pass your probationary 90 days or whatever it is/was, it's almost impossible to get fired.
So I'm stuck as the " foreman" of the loading dock doing all kinds of silly paperwork while receiving and sending mail at 8 bays, stupid shit like driver's name, truck #, how many postcons, bmc's, pallets they took and brought back, estimated percentage of truck filled,yada yada yada
If they wind up leaving late, I have to fill out a form explaining why , I came close to signing the late slips
Epstein's mother, more than once !
It was so much nicer to just be a 4 and sort the mail.
Carriers are usually level 6, at least that's the way it was about 15 years ago. It could be different now.
Carrier is not an easy job, I never tried it but it is not a glorified paperboy job, you don't even need a HS diploma to be a postal worker, but many have college degrees or at least some college.
Carrier is the most common job there, I know it ain't easy !
A fairly easy job is window clerk
Hands down the very best job at USPS is level 3 custodian, empty the postmaster's trashcan,maybe wipe his desktop, you'll never be noticed the rest of the day, do whatever you want to do, get paid about 80 % of a level 6 carrier's pay, no stress at all, you're virtually invisible
You just about have to be a veteran to get that gig, preferably a disabled veteran.