Curious About HR Generalist Roles in US IT Staffing: Do They Handle Contracts Too?

I would like to understand the role of HR in US HR activities. Do they also handle contracts? For your information, it's a US IT staffing firm with the role being an HR Generalist. I would greatly appreciate it if someone could provide clarification on this. I am looking forward to your valuable reply.

Thanks in advance.

To be frank, it is not the exact information that I am looking for. I asked about the role of an HR Generalist in a US staffing firm.