Finding someone who actually knows SEO and way to top is very hard today. Internet has become a junk box of these SEO service providers and everywhere you find a mouth talking about top rankings and what that person can do for you.
Finding someone who is really an extraordinary worker in this field is simple when you give a bit of time to it yourself. Search on internet and find companies with great reviews.
They can be of great use to use because no one leaves a good review until and unless they are satisfied with the SEO services offered by that company.