Managing Google Adwords for Dental Website

I am looking for a freelancer who have experience in managing google ads for a dental website. I already have a campaign setup in google AdWords and it is generating some conversions as well. I want freelancer to increase the conversion rate for the clinic. I am looking for a long term association as I want a person who can continuously working on google ads for 12-24 months. Measure of success would be based upon the conversions generated for a month