She became Visiting Lecturer at the Kenya School of Law after qualifying as a barrister in 1981, and held lectureship at both Cardiff and Bristol Universities. She later worked at the Commonwealth Secretariat in London, assisting Commonwealth governments on compliance with international human rights law. Dr. D’Sa was appointed to the foundation Chair of European Law at the University of Glamorgan, Wales and was also awarded a Jean Monnet Chair in European Community law by the European Commission. She has published extensively, including European Community Law on State Aid (Sweet and Maxwell, 1998) which has a foreword written by Lord Neil Kinnock, the former European Commission Vice-President. She also worked as a specialist consultant to Cardiff law firms Geldards and Blake Morgan. In preparation for their accession to the EU, Dr. D’Sa undertook numerous assignments in the Justice sector, in various Central and Eastern European countries.