He was Municipal Chief Executive for Akuapem North then was appointed by Nana Akuffo-Addo as Presidential Staffer with special responsibilities for local government, decentralisation and rural development. Dennis has served through the ranks of his Political Party, the New Patriotic Party. He is a leading Communicator for the Government and Party. He has served as an executive of the party at the Polling station before becoming a Constituency Youth Organizer for Akropong Constituency. He was the Campaign Manager for his party in Akropong constituency for the 2008, 2012 and 2016 Elections. He is a Patron of his Political Party at the Constituency and Regional levels.

He serves on several Committees for the Party at the Regional and National levels assisting in Strategy formulation and execution. Dennis Served as a Special Aide to the Member of Parliament for Akropong, Hon. William Ofori Boafo between 2007 – 2013. He was appointed as a Spokesperson for the Vice-President, H.E Dr. Mahamudu Bawumia During the 2023 Presidential Primaries for the New Patriotic Party. Currently serving as a Presidential Staffer with additional responsibility as the Executive Secretary for the Inter-Ministerial Coordinating Committee on Decentralisation, an 11member Ministerial Committee Chaired by the President, H.E Nana Addo Dankwah Akufo-Addo with the mandate of driving Policy Formulation and Coordination geared towards deepening Decentralization in Ghana.