You have found the right person for a U.S. role. They have the qualifications. The company wants them in America.
But that does not necessarily mean the H-1B route is straightforward.
The position must qualify as a specialty occupation, the employee must have the right qualifications for that particular role, a U.S. employer generally needs to sponsor the application, and many new H-1B cases are subject to an annual cap and selection process.
For UK-based professionals and employers planning a move to the United States, it is worth establishing those facts before building the relocation around an assumed H-1B visa.