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Your the consultant and Moz has the tool's to monitor and give you idea's on how to improve SEO. I would defiantly recommend checking out the on page grader - https://moz.com/researchtools/on-page-grader It has helped me improve my organic SEO really well by making sure I have the search terms in all of the right places. it's good to send to the customer as well so you can show them how there pages have improved. Communication to the customer is key with SEO. Moz does have a list of recommend consulting companies which may be worth checking out - http://moz.com/article/recommended