Been this way for years. I've experienced it in the public service sector. Many places have "rules" saying if 10% of the city's population is black, then 10% of the service (police, fire etc) has to be black. Job opening posts will say who they can accept. I'm bored so I'll dig around and see if I can find one.

Edit: I can only find them now saying the city of xx encourages women minorities etc to apply