Thanks in advance to those who can help me with my concern.
I am a farm supervisor tied to my work permit for my current employer. However, I am wondering if there's a way I can get an Open Work Permit so that I can work part time for other jobs, especially in Winter time wherein there's no work in the farm.
You'll have to tell us more about yourself for us to be able to answer your question. However based on the information you have provided above, you don't qualify for an open work permit. Open work permits are only granted in specific situations.
