Looking for the best SEO guru

We are a cleaning company based in LA. We have been in business for almost 12 years. We have a great website built with WordPress. We have a full time webmaster on ---------- w we need to take our SEO to the next level. We need to hire the best SEO guru we can find.

Please respond with your experience and show at least 3 examples of sites that are currently ranking on top of the searches from your efforts.