This is a question that could be asked when applying for an upper level management position. Keep in mind that the interviewer is asking WHY you believe you can fill an upper tier position, rather than IF you think you are the right candidate for the job. The difference is not subtle. Use one or more PAR statements to describe your success in leadership and management. Succinctly describe actions you have taken that demonstrate the best qualities required to lead and manage. Assuming you have thoroughly researched the company, try to specifically address the relevant contributions you can make and the things you can do for this employer. If you have limited work-related management experience describe your involvement with leadership functions from outside of work, such as executive duties in a civic, fraternal, volunteer or religious organization. Tell the interviewer about relevant experiences to demonstrate you know how to motivate, delegate, lead and encourage others to accomplish particular goals.