Dear Mr. Short,
I write in response to your advertisement seeking a CAD Designer for your company, and have included my resume for your review.
Briefly, I have worked as hands on CAD Designer for the past five years, and also have won a B.S. in Computer Science. I also continue my learning by taking classes in CAD topics to make sure I am as up to date with my skills and knowledge as possible. I am great at what I do, have an analytical and technical mind, and work well in a team environment.
To learn more about my candidacy, please review the enclosed resume; and then, contact me at [email] and/or (555)-555-5555 to arrange a time to speak. Thanks so much for considering for this position, and also your time in reviewing my qualifications. I look forward to your response.