SEO Expert - long term project for top ranking

Description We need an SEO expert who will get our site ranked on page 1 of [login to view URL] /[login to view URL] for 4 keywords : User Testing, Usability Testing, Testing User, Testing Users Please provide us the detailed SEO techniques you will use, and info of similar successful completed projects you have done.. We expect on ethical methods to be used, and for the successful company we will pay on performance per month also with rankings on other keywords being rewarded. Payment: A full milestone payment will be based upon successful achieving google/yahoo/bing/ high position for the given keywords. 50% of the payment will be paid on achieving 1 page result for one of the given keywords, and rest of 50% will be paid when all of the keywords are active on the top page of the respective search engines. If the project is successful in a reasonable period we will pay a monthly retainer for the company to maintain this service, with potential CPA/Affiliate deals