A comprehensive list of restricted employment can be found here
If a large city (e.g. Miami, New York or Los Angeles) is submitted as a potential place of employment, the following must be demonstrated:
Seasonality is described in J Summer Work and Travel regulations, 62.32 (b), as: “Employment is of a seasonal nature when the required service is tied to a certain time of the year by an event or pattern and requires labor levels above and beyond existing worker levels.”
The US Sponsor vets heavily on basis of seasonality and may require host employers to provide supporting docs, such as a revenue report or seasonality declaration.
Important!
Licenced by the Irish Aviation Authority, TA 0252