Move Site to Alexa Top 10000 rankings

Hi, We have a family social networking site. Around 6 months old. SEO for keywords is in progress and for many we are already on page 1. Alexa Site rank is 3,229,678. We want to move the site ranking to top 10,000-15,000 rankings. We are aware this is not an overnite job, and are willing to work out a reasonable time frame but need to work with vendors who know how to get this done in a reasonable time frame and only follow authentic, genuine methods - no black hat methods to be followed. We are also aware that this entails several things - and so experienced adn qualified vendors only apply. Will provide you the site links on pms. We are looking at working with qualified, top rated, and genuine experienced vendors only who have done this kind of job before. happy bidding regards