What is the relationship between Brian Hartzer and Westpac in the context of the input sentence. Choose an answer from: 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.

ANZ breaks ranks Before a Senate hearing last week both Westpac chief executive Brian Hartzer and AMP Ltd chief executive Craig Meller spoke in support of the ABA's position but when pressed each said their organisations would give their "in principle" support for a scheme of last resort .

Answer: employer