You are a Civil Engg: That occupation is found in Critical Skill List.
Code no: 2124-11 . This occupation is found to be in shortage list.
That means no need to worry as you will get it.
Also seems enough experience.
If you stick on to the post for Site Manager on immediate arrival you may have to wait 2 or 3 months (rarely)
First its better to make some months experience in Australia and stick on to that post.
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Applied Visa 175 April 2008 (Paper visa MODL, CSL ,)
Got CO and Medicals July 2009
MEDICALS and PCC finalized July 30th 2009
Job Verification November 10th 2009
175 VISA GRANDED 22nd December 2009