Looking for website SEO services

I am looking for my website to be SEO optimised so I can start to climb the search engine rankings. No work has been done on the website in terms of SEO. We have run paid ads in the past with varied success. With our market, organic traffic is very important. We are an established business and want to boost our organic web presence. We are a private investigator service based in the UK specialising in corporate and private surveillance. We understand it will take time to climb the rankings but want to be as close as possible to page one for relevant search terms in our area .

I am looking for the site to be optimised initially but will consider ongoing work for the right proposal. We will be able to assist with any keywords or web content should it be required. We are looking for the work to be completed quite quickly.

We look forward to receiving your proposals.