Stephen,
How would you feel if you got a pt sup job? And they said "show up tomorrow morning at 3:30 in city center, you're a new preload sup."
That is extremely rare for a large metro hub...Unless you're a puke and your manager does that to get you to quit. I've never seen it happen.
I'd say go for it, but only for the right reasons. No, I'm not a super pro union 20 year vet who hates management. In fact, 7 years ago I was just like you; a a kid in college tryin to pay for school, slanging packages in the hub at night (same one as you, in fact), with no intentions of going into management or sticking around.
Well, a few months into it went into PT management, finished school a couple years later, and before I knew it was in FT management. Earlier this year I was promoted to manager.
Two months ago I saw writing on the wall and quit.
No, I didnt have a problem with the 14 hour days, working every weekend plus holidays, getting your ass kicked for whatever decision you ever made, or being expected to turn on a dime at a moments notice. And it wasnt due to lack of performance since obviously I moved up fast. It's because the culture is changing (for the worst), and the theme of the future is simply "do more for less".
The company is moving in the wrong direction and going into management today is not what it was 15, 10, or even 5 years ago. At the highest levels: too many hands on the wheel and nobody's steering. Front line folks get dumped on more than ever, and UPS is far from the most attractive outfit on the block to work for, as it may have been years ago.
Do it for the right reason...Get some experience if you want, and move on. Dont make a career out of it unless you want to be bitter. I dont regret my time at UPS. Great experience. Decent money. Hardest working folks around. But dont get trapped, because next thing you know it's 15 years later and you have no applicable skills to make it in any other industry and you're a lifer.
So I left and never looked back. Now I work in a different industry, make twice as much, work less hours, and have about half the stress.
Good luck.