Costco Wholesale Corp. – 2901 LOS FELIZ BLVD [Customer Service / Member Service / Team Member] As a Membership Assistant with Costco, you will: Process member sign ups, renewals and added cards; Assist members regarding item availability; Issue replacement and temporary cards, key in credit applications; Provide a high level of member service. Costco offers great jobs, great pay, great benefits and a great place to work and believes future executive officers start out by working as a Membership Assistant. Be Valued >>