You can immigrate as a skilled worker if you have a diploma and experience in the following professions:
http://www.cic.gc.ca/english/immigra...tions.asp#list
"Restaurant and Food Service Managers
Primary Production Managers (Except Agriculture)
Professional Occupations in Business Services to Management
Insurance Adjusters and Claims Examiners
Biologists and Related Scientists
Architects
Specialist Physicians
General Practitioners and Family Physicians
Dentists
Pharmacists
Physiotherapists
Registered Nurses
Medical Radiation Technologists
Dental Hygienists & Dental Therapists
Licensed Practical Nurses
Psychologists
Social Workers
Chefs
Cooks
Contractors and Supervisors, Carpentry Trades
Contractors and Supervisors, Mechanic Trades
Electricians (Except Industrial & Power System)
Industrial Electricians
Plumbers
Welders & Related Machine Operators
Heavy-Duty Equipment Mechanics
Crane Operators
Drillers & Blasters - Surface Mining, Quarrying & Construction
Supervisors, Oil and Gas Drilling and Service "
Note: This list was taken from the CIC web site. If you are not sure if you qualify here is a great self assessment tool:
http://www.cic.gc.ca/english/immigra...tool/index.asp