What is the relationship between Campbell Newman and Mayor 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.

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