David Thomas Delpy, CBE FRS FMedSci FREng[4] (born 11 August 1948), is a British bioengineer, and Hamamatsu Professor of Medical Photonics, at University College London.

He went on to study at Brunel University, graduating with a first class Bachelor of Science degree in Applied Physics.

He was awarded a Doctor of Science degree by University College London in Medical physics.

[1] Delpy served as Chief Executive of the Engineering and Physical Sciences Research Council.[when?

[3] Delpy was appointed CBE in the 2014 Birthday Honours for services to engineering and scientific research.