Utilize the input text as a context reference, choose the right relationship between Campbell Newman and Mayor 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.

Despite his impressive CV as Liberal National Party campaign director in Queensland – which delivered a landslide to Campbell Newman in 2012 – and stints working as a gun for hire overseas including for London Mayor Boris Johnson, the extremely private Senator McGrath flew below the radar in his first 12 months in Canberra.

Answer: position_held