Dear Hiring Manager,
I have gone through your requirements and found that you want someone proficient in seo,smm,google updates,keyword research analysis,seo back link,on-page and off-page optimization.
I would love to legitimately improve your Google and Bing ranking as I am skilled in both Google and Bing webmaster tools and would like to do this project. I have good experience in seo and vast knowledge of all the seo techniques.
Currently I use SEO MOZ tool and Wordtracker tool for keyword research and analysis of website and assure you of positive and needed results. I will use this tool as this will monitor your site very well and give the best results possible.