Hi Bryan,
I don't know where you are based to sort out easily your customers' specific requirements. Try to establish, whether they require from you the Quality Management System acc.to the requirements of ISO 9001:2000 standard or any other standard(QA is the older term acc. to ISO 9001:1994 version of this standard) or is it enough for them to have provided some specific documents such as: project procedure manual, project execution manual including inspection and test plans, organisation charts, responsibilities matrixes etc. for a particular job.
Considering you have mentioned about "design procedures" and "communication" I suspect they mean full QMS acc. to ISO 9001:2000 (design is the 7.3. clause of this standard and the communication is the clause 5.5. of the standard).
The next question is whether your QMS system is to be certified by an independent certification body (third party) or not.
When you are sure what they actually want then consider employing a consultant. I am not able to recmmend anyone at the moment because I don't know where you are based.
As far as world-wide known structural and enginering consultancy companies having certified QMS are concerned, try to explore websites of Ove Arup (UK)- structural engineers, Fluor (USA)- engineering, procurement and construction including construction project management for the petrochemical industry,
EC Harris (UK?)- engineering consultants, CH2MHill (UK?).
If I am provided with some more details from you, may be I would be able to help you since I've been involved in third party assessments of QMS for several years.
Regards,
iceclass1994