John Marius Rodenburg FRS is emeritus professor in the Department of Electronic and Electrical Engineering at the University of Sheffield.^[3][4] He was elected a Fellow of the Royal Society (FRS) in 2019 for "internationally recognised... work on revolutionising the imaging capability of light, X-ray and electron transmission microscopes".^[5]

Rodenburg was educated at University of Exeter where he was awarded a Bachelor of Science degree in Physics with Electronics. He moved to the Cavendish Laboratory^[6] to complete his PhD on the detection and interpretation of electron diffraction patterns which was awarded by the University of Cambridge in 1986.^[7]

Rodenburg worked until 1999 in the University of Cambridge as a University Research Fellow of the Royal Society.^[8] He is currently emeritus professor in the Department of Electronics and Electrical Engineering at the University of Sheffield.^[9]

His research interests have mostly been in improving the resolution and other capabilities of electron, X-ray and optical microscopy by processing diffraction patterns instead of using lenses. He has innovated many key developments in the diffractive imaging method called ptychography.^{[10][11][12][13][14][15][16]}

In 2006, Rodenburg co-founded Phase Focus Limited, which uses ptychography to image live cells to improve cancer drug design. He served as a director and Chief Scientific Officer from 2006 to 2015.^{[2][17][18][19][13]}

Rodenburg was elected a Fellow of the Royal Society (FRS) in 2019.

Rodenburg is married to the material scientist Professor Conny Rodenburg,^[20] and is the brother of the voice coach and writer Patsy Rodenburg^[21]