David joined Heriot-Watt University in 1989 as a Research Associate before transitioning into an academic role. His research in water supply and drainage within the built environment has led to numerous patents.

Throughout his career, David has taken on various responsibilities, including serving as Postgraduate Programme Director for Architectural Engineering, Admissions Tutor for the Postgraduate Building Services Engineering programme, and teaching numerous courses. His contributions have had a lasting impact on both research and education.