Hey there,
A good start would be to check the alumni guest book on the Seneca website and see where other people got their start. Most graduates can give you lots of information if you ask.
To get a decent flying job or bush job in Canada there are couple things you need to know.
1- It's very unlikely that you'll get hired just by sending in a resume. Moving up to a small town is necessary. Yes, before you even have a job.
2- You will not get a straight flying job, plan on working the ramp for a year or two. Plan on two years, that way if you do get on sooner it'll be a surprise.
3- Your first flying job will pay like crap, but hopefully; you'll be happy you're flying and won't care
4- Seneca is a good school and gives you top notch training, but in the north nobody cares that you went there. Take what you learned, lose the ego and don't wear the jacket to hand out resumes.
Good Luck!