What do you think of a part time worker working for both companies to make ends meet? I've seen a few employees at my center that work for both and i think the number will grow nationally due to the set schedules and low wages of both companies.
Believe it or not I actually don't know what the company policy is on this! My guess it is not on the radar.
However, I do have an opinion! (sorry!) If it is at all possible, I would try to find work in the area that intrigues me. If you have a real passion for something...why not try and find work in that field??? You may find that you really excel and become so successful you don't have to work at UPS or FedEx.
My wife told me that after I retired I should be a consultant. I told her that I am not crazy....if I wanted to continue working I would stay at UPS! I want to enjoy the holidays and enjoy not working crazy hours for once in my life.
If I ever work again ... it will be doing something I really have a passion for.