seo consultant needed for long term

We are looking for seo consultant, who can guarantee us first page on Google. We do seo for 4-5 sites a month. We can manage articles, directory submission etc on our own. We requirement expert who can guarantee for first page and rank should retaim over there for at least 2 months. We can keep you as seo consultant for all the sites if we are happy with your quality. We also know how to get first page with ethical/white hat way, but our rank is not stable over there. So we want seo consultant who can provide us one way quality links.