Q : If I sign one MOU, can I use a controlled rollout to implement E-Verify across the organization?

Yes, you can choose which sites to enroll. However, remember that each site that has signed an MOU must verify the status of all new hires for that site. A new MOU is required only for a new site performing verification queries. However, if a central location, which is already registered, does the verification queries, then the company would only need to amend the number of hiring sites.