Costco uses the same set of behavior based questions for internal or external applicants, like "tell me about a time that you demonstrated excellent member service" or "give me an example of a time you resolved a conflict." Be prepared to tell of specific experiences as they often "drill down" by asking follow-up questions about specific details. Costco rarely hires supervisors or managers from outside, so be prepared to start at the bottom regardless of your education and background. Also, union locations promote based on seniority so avoid them if you intend to move up quickly. Pick a thriving market with frequent warehouse openings for the best opportunities. Also, be willing to do any job and have open availability to get your foot in the door. The high volume of applicants compared to hiring needs makes them reluctant to hire anyone with availability issues.