Career
He is currently Deputy Leader of the Opposition in the Northern Territory. McCarthy held several ministries in Paul Henderson"s cabinet: on 9 February 2009 he joined the cabinet as Minister for Transport and Minister for Correctional Services. On 6 August, he gained the additional portfolios of Arts and Museums, Senior Territorians, Young Territorians, and Minister Assisting the Chief Minister on Multicultural Affairs and Education.
From 4 December 2009 to the defeat of the Henderson government at the 2012 Northern Territory election, he was Minister for Lands and Planning, Transport, Construction, Correctional Services, and Arts and Museums.