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Dear Mr. Smith:

This is in response to our advertisement published in Jobsjobs Times, for the post of Data Entry Supervisor. I look forward to serving your company with diligence and honesty; apart from maintaining a high level of efficiency.
Proficiency in computer applications, apart from a natural flair for observation, has helped me, in maintaining high levels of accuracy, through all these years. Quality maintenance has been my forte and I wish to use it for the benefit of your firm.

During the course of my service I performed a number of duties, like ensuring the effective conversion as well as verification of the data in computer-readable format, apart from ensuring the proper utilization of the external data conversion services.

Please consider my application for the aforementioned post. Enclosed with the application, is my resume, along with photocopies of my credentials, for your evaluation. You are free to contact me on the address mentioned above, or call me at (000) 000-0000.
Thank you for considering my application.

Sincerely,

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