In 2007, Cox was appointed Minister of State in the Ministry of Community Development, Culture and Gender Affairs. On 3 April 2008, Cox was appointed Minister of State in the Ministry of National Security.[1] Cox was re-elected in the 2010 Trinidad and Tobago general election, this time in Opposition. In 2019 Cox was appointed a Senator and Minister of Communications.[2] In 2024, as Social Development and Family Services Minister Cox increased the minimum wage for public servants.[3]