It should be posted in TSC with all The available spots open but I can tell you from my experience some positions won't be listed. I've read in other threads just like this one that it seems like the bosses already have someone in mind and don't bother posting the position; which could be why you never hear of positions and the next day you go into work someone has moved up! But to be honest who knows! Target works in mysterious ways. My advice to you would be to do the best you're doing and if there is a workcenter you're interested in and want to move up, it doesn't hurt to let the TLs or ETL of said workcenter know. If a opportunity arises, they will know of your interest. You can apply for positions through eHR, I don't believe they're listed so you have to check through each workcenter. You have the right to apply but before doing so, the application will tell you to talk to your current ETL and HR before doing so. A heads up doesn't hurt and disregard their ill-wishes if they prefer you not applying, it's your decision!