Utilize the input text as a context reference, choose the right relationship between Brian Hartzer and Westpac 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.

Brian Hartzer, Westpac chief executive Westpac chief executive Brian Hartzer said in a memo sent to the bank's staff on Friday that Disney is "one of the world's most loved brands and their Next Generation Experience program has set a new benchmark for how great service can be delivered in a digitally-enabled world".

Answer: employer