Utilize the input text as a context reference, choose the right relationship between Macquarie Group and Peter Warne 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.

Michele Mossop by Joyce Moullakis Macquarie Group has appointed Peter Warne as chairman after Kevin McCann flagged he will step down in March next year.

Answer: chairperson