1. Fragomen — Manhattan (headquarters), Manhattan
The world's largest immigration law firm — the default for companies moving people to New York.
Fragomen was founded in New York and has grown into the largest immigration-focused firm in the world, with offices across dozens of countries. Its core business is corporate immigration: work visas, intra-company transfers, employment-based green cards and global mobility programs for employers.
If your employer is sponsoring your move, there is a good chance Fragomen is already handling it. It also advises individuals, but its scale is built around corporate clients.
Good to know: If you are being relocated by a large company, ask HR which firm they use — it is often Fragomen, and your case may already be open.