In Seth Carr’s article on Brazen Careerist, he points out that every job has elements of customer service. Even if you are not interacting with literal customers or clients, you are serving your supervisor, co-workers, and members of other departments. This makes customer service a very important transferable skill. Read the full article here.
When you write your resume, be sure to incorporate and emphasize your customer service experience, especially if you have worked in a restaurant, retail, or office environment.