With over nine years of experience in interior design, I've developed the skills and knowledge necessary to successfully complete projects both large and small. I am writing to apply for the Interior Designer position at your company.You will need to write a targeted letter for each position. Content. Learn how to write an interior designer cover letter. Get expert tips and downloadable cover letter examples for all levels of experience. Highlight your strongest skills. Use your cover letter to describe your qualifications as well as your interest in both the job and organization so the employer will want to interview you. A wellwritten, customized cover letter should include the 'company's name, position, and other identifiers included in the job description.