The Working Holiday Authorisation (WHA) scheme is operated by the Department of Foreign Affairs and Trade. A person who holds a WHA is required to obtain a permission from the Minister for Justice and Equality to enter, reside and work (under the terms of the WHA) in the State. Under the terms of the WHA, it is not possible to apply for an employment permit whilst in the State.
Therefore, the terms of the WHA preclude this Brazilian national from being eligible to apply for an employment permit.
The foreign national may consider submitting an application for an employment permit from outside the State, on foot of an eligible job offer, which will be considered subject to the usual criteria applying under the Employment Permits Acts and Regulations.