Dear Sir/Madam,
I want to do this job.
I have done this kind of jobs satisfactorily in my workplaces (large corporations/industries in Middle-east and in North America) regularly for the last 20 years and I am confident that I can serve you as per your expectation.
While I work for you, I will complete the assignment on time and ensure accuracy, maintain confidentiality as well as excellent quality of my work.
Thanks for your kind consideration and your valuable time.
Sincerely,
Hadi