Writing a cover letter as an essay.

Dear Mr Powell,

I am writing to enquire about the position of sales manager advertised in a local newspaper.I am a third-year business administration student, so I am sure I will be able to draw on the knowledge I have acquired at university.I have become increasingly interested in persuing a business administration carrer, and I am particularly interested in starting my professional life in a well established company with international renown; as your company is one of the best positioned in the sector,I have been doing some research into your organisation,and I have found out that the fact that your company has been nationally and internationally leading the business market for more than twenty years along with the extensive operations abroad, with presece in countries such as England,Germany,France,Japan,and Australia among many others,makes of your company,without a doubt, the ideal place to gain insight into the global business market; not to mention the many other personal and professional growth opportunities that the company can offer. As you can see from my c.v., I have been actively participating in community service projects as a volunteer,which describes my team spirit and capacity for encouraging team partners to work for a common good. Thank you for taking your time to consider this application and I look forward to hearing from you in the near future.

Yours sincerely,

Juan Almirante

Is this "letter" coherent? Any teacher out to give me tips on how to write this essay properly? I'm taking the Cambridge Advanced exam soon, THANKS A LOT !