I 1991 blev han ansat i International Regulatory Affairs Division i Glaxo Group Research Limited, hvor han var ansvarlig for udvikling og indgivelse af en række internationale registreringsansøgninger inden for forskellige terapeutiske områder.
In 1991 he joined the International Regulatory Affairs Division of Glaxo Group Research Limited where he was responsible for the development and submission of a series of international registration applications in a number of therapeutic areas.