 While in Opposition during the period 1995–2001, and 2010–2015, he worked as a property developer and project manager on a number of substantial building projects in Trinidad and Tobago and the Caribbean.Imbert first entered elected politics on 16 December 1991 by winning the Diego Martin East seat for the PNM in the 1991 general elections, defeating the incumbent Anthony Smart of the NAR with 7,111 votes (54.98%).He was appointed the Minister of Works and Transport and Minister of Local Government in the PNM Administration during the four years following the election.