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I have a small business in Vancouver, British Columbia, my business details http://www.VancouverLocksmith.Com, if I want to hire someone from Nigeria, he can get a visa for working in my company?

You need to obtain an approved LMIA before he can qualify for a work permit. The LMIA process typically takes 4-6 months to complete and the first step is to advertise the job for at least a month (following the LMIA advertising requirements) to prove no Canadian could be found for the role.