Boyce was the chair of Everhard Industries, a plumbing supplies company founded by her father Alfred Davis, a position from which she resigned from after her elevation to the Senate.
[2] In 2009, she was one of two Liberal senators to support the federal Labor government's emissions trading scheme.
[citation needed] In 2013, she was the only one from her party to cross the floor to vote for same-sex marriage bill.
This made her the first and only federal Liberal politician to vote for marriage equality before the 2017 postal survey.
[3] On 8 October 2012, Boyce announced her intention to retire and therefore not contest the 2013 federal election.