Utilize the input text as a context reference, choose the right relationship between Big Lots and retail from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Jack joins Big Lots after seven years in leadership roles at Walmart and with more than 25 years of global retail experience spanning merchandising, sourcing, category and brand development.

Answer: industry