According to CIC, your brother - the 'employer' must submit an application to Human Resources and Skills Development Canada (HRSDC) for an Arranged Employment Opinion (AEO). The employment must be permanent, non-seasonal and full time, and wages and working conditions offered for the job must be comparable to those offered to Canadians working in the occupation. HRSDC must assess the genuineness of the employment offer. If valid, HRSDC provides the employer with an AEO letter of confirmation. The employer would then provide this, along with a job offer letter, to the foreign worker to include in his immigration application
The Temporary Foreign Worker Program also allows employers to hire foreign workers to fill temporary labour and skill shortages.
He may be able to hire eligible foreign workers to work for him temporarily if he can prove that:
* He cannot find suitable Canadians or permanent residents to fill the jobs
* Bringing the workers to Canada will not have a negative impact on the Canadian labour market, and
* He meet all other requirements and conditions.
Check CIC website for more explanations.