David is an internationally award-winning scientist and recognized global expert in immunoassay development, electrochemistry and chemical sensors. He was formerly Head of Chemistry at University College London and Chief Scientist at Alere (when known as Inverness Medical Innovations) at the time when it developed Clearblue Digital, the first digital home pregnancy test. David co-founded Capteur Sensors Ltd and Aeroqual Ltd. He is currently based at The University of Auckland and is an Emeritus Investigator of the MacDiarmid Institute for Advanced Materials and Nanotechnology, and Associate Investigator of the Maurice Wilkins Centre for Biodiscovery and of the Centre for Medical Device Technology. He is an Adjunct Professor at the University of Queensland.