Dear Sir/Madam,
I am glad to offer my translation/proofreading/editing skills on this project. I am a qualified Academic English teacher, having experience of translating/editing/proofreading at international organizations like British Council, United Nations and EU. I am also a native Russian speaker. I am very precise and responsible, have excellent communication skills, which I believe make me a suitable candidate for this job.
I appreciate greatly given opportunity and look forward to working with you.