Open your letter with a strong sentence that defines the purpose of the letter. All letters of application should follow the standard business letter format.First-year applicants can apply to Clark using either the Common Application or the Coalition Application with Scoir. Choose the method that suits you best. The letter should capture the employer's attention, show why you are writing, indicate why your employment will benefit the company, and ask for an interview. Name, Position, Phone Number. Darcel D. Clark, District Attorney, 718-590-2000. You should also request an interview. For questions or concerns, click here to contact Clark County. Phone: (702) 455-0000.