As a professional writer and native English speaker, I have all the skills required for this project. My English is perfect, my spelling, grammar and punctuation are all up to a professional standard and my ability to write compellingly and engagingly is excellent. My editing skills are also very useful to you in this instance; knowing how to format and properly present a letter is essential in job applications, especially to notable figures.
I have a degree in English Literature from a top UK university, which has given me an exceedingly good knowledge of how to write proposals - the kind of language required, the ability to present yourself appealingly, and the research needed to form the perfect letter to get you what you want. I am more than willing to work with you to present you as well as possible for the position you are applying for.
Thank you for reading my proposal - I look forward to hearing from you soon.