As I said above, in the Federal government and some lower levels of government, there are set-asides in contracting for certain classes of businesses.I'm unfamiliar with the realities of affirmative action in the US.... have you got links as to how it's applied and where?
Other than that, about the only piece of "affirmative action" still allowed in employment is to require outrach to minority communities in hiring. That means things like seeking applicants from minority and underrepresented communities. Note that I said "applicants." It is specifically illegal to hire someone or refuse to hire someone because of her race, whatever that race may be.