My husband who is a nurse educator was once asked to come speak at a school for propsective STNA's who were getting ready to graduate about what to wear,how to present themselves, etc. At that time, his position included HR responsibilities.
He told them business casual, no low-cut or too-tight, clingy clothes, nothing too short (really just above the knee or lower for skirts), no sweatpants, no jeans, no bare midriffs. Keep jewelry to a conservative - no large, dangling earrings or noisy bracelets or things that can be a distraction. Don't chew gum, don't talk on your cell phone - put it in vibrate while in the office/facility. He said there were so many people who came in to apply for jobs that were automatically not even considered for positions based upon the way they looked and or conducted themselves just while waiting in the waiting room for a few minutes.
Present yourself in a professional, competent manner. Make sure your resume doesn't have any spelling or grammatical errors. I personally have seen MBA's apply for jobs where I currently work with major spelling errors.
Good luck!
