SEO may seem simple at the first sight but in reality it’s a time taking process. It needs continuous effort and extra care in implementing all the techniques. A lay person may know the techniques of SEO but will be unable to put it in right direction. All these complexities make SEO a difficult task that can be done successfully only by search engine optimization specialists because they are the one who know how search engines function and how a successful SEO is done. So for a successful SEO, a proficient SEO specialist is somewhat a necessity. And for hiring a good SEO specialist you may have to roam around and take into consideration a lot of aspects that would ultimately assist you in hiring a good SEO specialist.
Well i think hiring good SEO specialist or good SEO company is very difficult task.SEO become more difficult from Google updates and any bad SEO can harm your site.So beware of bad SEO techniques and bad SEO specialist.