Canadian labor unions are being contacted about this as well and being asked for their assistance.
Unfortunately CargoJet is not unionized, Not really surprised about this Cargojet doesn't keep to agreements and such with its own pilots.
I am curious as to how a Canadian company can fly cargo domestically in the US, would this in fact be some sort of cabotage rule? Just think if a US company tried that up here.
Edit: noted it was an international flight not US Domestic