Michelle was elected to the House of Representatives in 2010 as the Member for Greenway. Prior to entering Parliament she was a senior lawyer specialising in competition and regulation in the telecommunications, media and technology sectors.

In 2013 she was appointed Shadow Minister for Citizenship and Multiculturalism, and Shadow Assistant Minister for Communications.

In October 2015, Michelle was elevated to the Shadow Cabinet and appointed the Shadow Minister for Small Business and Shadow Minister for Citizenship and Multiculturalism.

Michelle was re-elected at the July 2016 election and appointed Shadow Minister for Communications. Michelle was again re-elected at the May 2019 election.

In June 2022, Michelle was sworn in as the Minister for Communications.

Michelle has served as a Councillor and Deputy Mayor of Blacktown City Council, Chair of Screen NSW, and a Director of the Western Sydney Area Health Service.

Michelle is married to Michael and they have two young daughters, Octavia and Aurelia. Michelle is passionate about affording everyone, regardless of their background, equality of opportunity.