Eldridge is the head of the Department of Physics at the University of Auckland and co-author of The Structure And Evolution Of Stars.

[1] They also obtained their PhD in astrophysics at Cambridge, in the Institute of Astronomy, with a thesis titled 'Progenitors of Core-Collapse Supernovae'.

[4] At the University of Auckland, together with Elizabeth Stanway [Wikidata], they co-developed the Binary Population and Spectral Synthesis (BPASS) models to study the evolution of stars.

[6][5] Together with Christopher Adam Tout, they wrote The Structure And Evolution Of Stars, published in 2019 by World Scientific Europe.

[10] Their efforts have been recognised as key in winning the Pleiades Bronze Award by the Department of Physics at the University of Auckland.