I was working traffic control in Security, when I noticed a black sphere floating by. It was the size of a SUV, maybe two.

Me and a coworker were working Security traffic control when I noticed it floating by about 1/2 mile or less to our West. It was a black sphere with no markings on it. I could not hear it. I ran to my coworker and pointed it out, but he was looking too high in the sky. It was at the Horizon level almost. I only saw it for about 30 seconds and that included trying to get my coworker to spot it. Our buildings blocked my view as it traveled south. I'm kicking myself for not going to our security dept. and getting footage. I know we would have had it, but we only save it for 30 days.