Cardio or weights first?

Let’s imagine you were looking for jobs and you had a really big interview, would you put yourself in a situation to only be able to perform at 80% of your maximum ability?

Outside of the movie Office Space, probably not, so why put your body in that position when working out?
When you run cardio before your resistance training, you tire out your muscles thus minimizing the potential for muscle hypertrophy (muscle gain). Not to mention that you can potentially lose large amounts of muscle with extensive cardio as your body will take what it needs for proper energy.

Full body warm-up (at a low to moderate intensity) - resistance training - cardio - cool down.

Put yourself in the best position to look great.