Dear Mrs. Mendoza,
I saw your listing on www.dice.com, and I am very excited about applying for the position of Advertising Operations Manager for your company. I offer all that you outline in your experience requirements, and have enclosed my resume for your convenience.
I have been an Advertising Operations Manager for Google Inc for the past six years, and therefore, exceed the minimum you set of four years. I have a degree in Advertising, as well as four years as an Advertising Account Executive for Gannett Digital. I believe this experience more than qualifies me for the responsibilities that you require in your advertisement, as well as my ability to motivate a team, sell by example, and take care of every operational need in the office that is required for success.
Please find my enclosed resume, and contact me at your convenience to meet. I can be reached at (555)-555-5555.