Hi Bob, There's a Pen-tester certification available called "Certified ethical Hacker" by Ec-council.
www.eccouncil.org
This course teaches you to hack Microsoft and Linux OSs, and webservers, etc....Great great course.
I had to go to Washington to get trained. The instructor there also teaches the FBI, CIA and Navy Seals. the school is called Vigilar.
but if your from Montreal, there might be a SANS course aswell.
also, go to
www.securityfocus.com and subscribe to the postings. There's some great info here too.
Good luck !
Frank OZ
Master CNE , CDE, CLP, Certified Ethical Hacker
jedi31337@gmail.com