Dexter has extensive litigation experience and has represented clients and filed diverse pleadings before courts, administrative agencies and tribunals. His areas of practice include civil and criminal litigation, labor law, obligations and contracts, family law, estate settlement, legal ethics, and corporation law. He is a graduate of the University of the Philippines College of Law.
He served as a consultant for the Department of Finance (DOF) and contributed to the institutionalization of leading practices in case handling and management of cases, and identifying areas of policy and institutional reforms. He also led a team of legal specialists in the implementation of a capacity building program of the Ateneo School of Government to improve the anti-corruption and revenue collection efforts of the DOF. The said team provided guidance on the improvement of the process of filing and prosecution of administrative cases, and proposed a revision of the procedures governing these administrative cases. The team also lent direction on the advancement of case buildup and prosecution under the Run After the Smugglers (RATS) program of the Bureau of Customs and the enhancement of coordination with the prosecutorial agencies of government.