Write a letter to the company you have been referred to.
My good friend (name) suggested that I contact you regarding the vacant position with (name of company). I am enclosing my resume for the same since I feel that my educational qualilfications, along with my professional experience, makes me an excellent candidate.
I have more than 10 years of experience in the field of (----). In my previous jobs, I have been consistently rewarded for hard work with promotions and increased responsibilities. I do my work with commitment to excellence, and I have my excellent written and oral communication skills, and team spirit.
If you have questions, or if you want to schedule an interview, kindly contact me at (phone no.). I shall look forward to meeting you and further discussing my qualifications and employment opportunities with you.