Checking Engineer

Hello,
I am seeking an engineer to check the engineering design and documentation that we have been provided for a residential double story extension and carport project in Perth, Australia.

The original engineering firm provided the engineering drawings via a "package" through the Building Surveyor we engaged to obtain the building permit, and they've been hard to get a hold of subsequently

We would like to ensure that the engineering drawings and specifications provided will meet our project requirements. And if located locally /nearby in Perth, a few site visits would be beneficial too, but this is a not a requirement. We are owner builders.

Drawings provided on the acceptance of the job.

Thanks,
Chris