High quality (White Hat) SEO services required

Hello, I am looking for someone / a company to boost our rankings as organically as possible.
In the past I have paid for various link submissions and article submissions in the hope of quick results and they haven't increased our rankings. In fact I fear something has been overdone as we have slipped off the rankings for one of our main keywords.
This is leading me to be much more cautious and prepared to except that a safe method of SEO is perhaps a slower one.
I want to take someone on who can recify what is wrong with our on site and off site SEO. I would be happy to pay a wage and if successfull ideally make it an ongoing job for an indefinate time working on other sites I own.

mark (at) optigon (dot) co (dot) uk

Pm me fore more details

You can check out my website at Global I.M Providers. I would be more than happy to speak with you about our services and what we can do for you. We can taylor packages to suit your needs.