goodie -
You need to be referring back to the list below every time you find a NOC you think might match your experience:
http://www.cic.gc.ca/english/immigrate/skilled/apply-who-instructions.asp#listNOC 9517 is not on the list. So you cannot apply under this NOC right now unless you have a job offer.
As Mezo2009 has mentioned, this list is expected to change in June 2011. Unfortunately no one knows what changes to the list will be made.
If you really want to apply before June 2011 and you do not have a job offer, you will have to apply under one of these NOCs:
Managers
0811 Primary Production Managers (Except Agriculture)
1233 Insurance Adjusters and Claims Examiners
2121 Biologists and Related Scientists
2151 Architects
3111 Specialist Physicians
3112 General Practitioners and Family Physicians
3113 Dentists
3131 Pharmacists
3142 Physiotherapists
3215 Medical Radiation Technologists
3222 Dental Hygienists & Dental Therapists
3233 Licensed Practical Nurses
4151 Psychologists
4152 Social Workers
6241 Chefs
6242 Cooks
7215 Contractors and Supervisors, Carpentry Trades
7216 Contractors and Supervisors, Mechanic Trades
7241 Electricians (Except Industrial & Power System)
7242 Industrial Electricians
7251 Plumbers
7265 Welders & Related Machine Operators
7312 Heavy-Duty Equipment Mechanics
7371 Crane Operators
7372 Drillers & Blasters - Surface Mining, Quarrying & Construction
8222 Supervisors, Oil and Gas Drilling and Service