Seniority dates


UPS Package Car Driver
I finally got my transfer to the building I wanted to go to. I started working and then seen a bunch of new drivers coming out of training to be a full time driver like a week or 2 after I already started working in my new building. I seen the building seniority list and they have more seniority than me almost by a week, and I know for a fact they weren’t even working in the building because I remember having to help one of them a couple times during his first or 2nd day out on road. Can this be right? And also they all started after 10/2018 would they be under the new contract also?