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.

Role models "By celebrating these 100 women and recognising their achievements, we are helping to create role models that will inspire and give confidence to the next generation of influencers to come," Westpac chief executive Brian Hartzer said.

Answer: employer