I worked for Costco just under three years. I did everything in the warehouse such as meat department to working inside the freezer. Worked my a** off! At the time I was working on my A&P license and I was a 1000 hour commercial SE and ME, instrument rated flight instructor. I used Costco to help me with continuing my education. The warehouse manager actually encourage me to call the flight department. I gave them a call not expecting much. I actually found the conversation to be discouraging. Around two months later I gave my two weeks notice because I was going to work for a charter company as a pilot/mechanic. Costco flew a position as a support person for the flight crews. Again I was encouraged to call them back. I did and found out the primary job was to update the Jepp charts and clean the cabin. I chose not to pursue it but I'm sure I would have ended up flying for them someday.
Looks like I made the right choice though. I am 5 years from retiring at a young age with full benefits but I may work another 10 to 15 because I enjoy what I do. Costco doesn't have that kind of retirement but does pay well.