Why must we get working visa's before working overseas?

Question

im thinking of working a ski season in canada... im from australia

how long do visa's last for?

should i apply for a job before applying for a visa?

is there anything else i should think about when applying to work at a ski park?

Answer 1

Yes, it is illegal to work in the US without the appropriate documentation.  You should look at the US embassy in Canberra's website as a start.  You should also contact some US ski resorts to see if they have hired foreigners before.

I do not know how long a visa will last.