Professional SEO specialist, required. competent, reliable and skilled

Professional SEO specialist, required. competent, to understand current issues, how Google works, etc, website - onlinemastering.org.uk need SEO work, ongoing, on monthly basis. I am looking for someone with experience, skills and knowledge.
I understand current situation with my website, I need good quality links, white hat SEO, working, not empty promises, therefore you get paid when you deliver.
My aim is to double amount of my url visitors.