I was on a contract for the government when my company hired a really good DBA. He hated dressing up. He was introduced at a meeting and wore a polo shirt, which I thought was fairly professional.
Government contracting guy said to wear a tie.
Next meeting, he wore a tie around his polo shirt.
He was fired on the spot.
There are times I fucking hate the government and this was one of those times.
The guy was fucking amazing. But my company fired him because the government didn't want someone so sloppy on the team.