If your specific occupation is in need in Quebec you wont have too much trouble getting a job in one of the several English hospitals in the Montreal area or if one of the large pharmaceutical companies located around Montreal will hire you on they may your immigration by sponsoring you..
As for your kids learning French? they wont have much choice if they are attending public schools as all immigrant children are required to attend French school.
You may have better luck getting a job in Toronto and there are many schools there that are heavy on the French curriculum.
Have you looked into what legal hoops you'll have to jump through to have your particular skill recognized in Canada? and i believe different provinces have different requirements.
Good luck
PS some Pharmaceutical companies near Montreal
http://www.canadian-universities.net...al-Quebec.html