The interviewer wants to know, in detail, how you will contribute to their design firm, should you be the successful candidate. When you approach this question, focus primarily on the hiring company's needs and the direct benefits of hiring you. Think - what is in it for them if they hire you as a Design Consultant. Ensure a highly-targeted response by taking the time to dissect the job description and uncover what you believe to be the company's greatest needs. Be as specific as you can when discussing the meaningful contribution you plan to make as their newest Design Consultant.