It depends on whether your adjustment application is employment-based or family-based, as well as your immigration category.
For an employment-based case, your adjustment petition will be adjudicated by a USCIS officer at a service center that handles applications from the state in which you currently live. (current employer)
For a family-based case, your adjustment petition will be adjudicated by a USCIS officer at a local office with jurisdiction over your place of residence.(new employers attorney)