Any collection agency can, within reason if you are not a recipient of relief based on need (i.e. food stamps, medical assist., SSI, etc.), garnish wages from your employer.
Can Credit Card Companies Garnish Your Wages In Florida For Credit Card Debt?
Yes, but in order to do so, they'll need to obtain a judgment against you. My previous poster is again true in pointing out the fact that in the event you're relying on SSI benefits, then they can't garnish it.