? 
The first requirement you have to meet is the occupation in which you are applying.... that occupation must be one of the 30 high demand occupations in the list.
All the best..... civil, mechanical, electrical chemical engineers cannot apply
http://www.cic.gc.ca/english/immigrate/skilled/apply-who-instructions.asp#list
Is my application eligible for processing?
In order for your application to be eligible for processing, you must either:
- have an offer of arranged employment, OR
- be
a foreign national who has been living legally in Canada for one year
as a temporary foreign worker or an international student, OR - be
a skilled worker who has had at least one year of experience* in one or
more of the following occupations within the last ten years:
*Experience is defined as continuous full-time or equivalent part-time paid work experience
0111: Financial
Managers
0213: Computer
and Information Systems Managers
0311: Managers
in Health Care
0631: Restaurant
and Food Service Managers
0632: Accommodation
Service Managers
0711: Construction
Managers
1111: Financial
Auditors and Accountants
2113: Geologists,
Geochemists and Geophysicists
2143: Mining
Engineers
2144: Geological
Engineers
2145: Petroleum
Engineers
3111: Specialist
Physicians
3112: General
Practitioners and Family Physicians
3141: Audiologists
and Speech Language Pathologists
3143: Occupational
Therapists
3142: Physiotherapists
3151: Head
Nurses and Supervisors
3152: Registered
Nurses
3215: Medical
Radiation Technologists
3233: Licensed
Practical Nurses
4121: University
Professors
4131: College
and Other Vocational Instructors
6241: Chefs
6242: Cooks
7213: Contractors
and Supervisors, Pipefitting Trades
7215: Contractors
and Supervisors, Carpentry Trades
7217: Contractors
and Supervisors, Heavy Construction Equipment Crews
7241: Electricians
(Except Industrial and Power System)
7242: Industrial
Electricians
7251: Plumbers
7252: Steamfitters,
Pipe fitters and Sprinkler System Installers
7265: Welders
and Related Machine Operators
7312: Heavy-Duty
Equipment Mechanics
7371: Crane
Operators
7372: Drillers
and Blasters – Surface Mining, Quarrying and Construction
8221: Supervisors,
Mining and Quarrying
8222: Supervisors,
Oil and Gas Drilling and Service
9212: Supervisors,
Petroleum, Gas and Chemical Processing and Utilities
NOTE: the occupations above are all Skill Type 0 (managerial occupations)
or Skill Level A (professional occupations) or B (technical occupations and
skilled trades) on the Canadian National
Occupational Classification list.