If there's a unit that you want to work on, call the nurse manager of that unit and schedule an appointment to talk to them about the unit. It's a chance to find out what that unit is about, but it also gives you a shot to showcase yourself. Bring your resume and make sure that your application is up to date. Yeah, it's a little bit sneaky to bypass HR, but desperate times call for desperate measures. The manager may grease the wheels if they are interested. That's how I got in, anyway.