Many professions are regulated in Canada. In many cases the requirements to become licensed to practice in a regulated profession amount to a "paper curtain" keeping completely qualified new Canadians from even seeking employment in their fields of expertise. Witness the classic "Doctor driving a cab" stories.
It's important for Skilled Worker Class immigrants to understand what they are getting themselves into before they begin the immigration process by getting as much information as possible about what will be required to find work in their fields. Often this involves a mix of educational, language and experience factors.
"The Foreign Credentials Referral Office offers internationally trained and educated individuals authoritative and accurate information on the Canadian labour market and Canada’s credential assessment processes. It also provides path-finding and referral services to immigrants. These services are offered overseas and in Canada to help immigrants apply their skills and credentials in the Canadian labour market."
The Working in Canada Tool is an online application provided by the Office that helps prospective immigrants and newcomers understand whether or not their profession is regulated and if so, some of the core requirements that will need to be addressed before they can practice.
I hope this information is of assistance to those of you intending to apply as Skilled Workers.