I believe that my strong educational background and extensive experience in the [field], make an appropriate candidate for the advertised position. As you can see in the enclosed resume, I have been working as a [Postion] with the [Company] for [X] years. Since, my responsibilities and duties were quite similar to those required in the ad of your organization, I strongly believe I can perform well all the delegated duties and tasks. As I greatest success on this position I would like to point out that I have [explain briefly].