[7] After her PhD, Rickaby went on to complete two years of post-doctoral research at the Department of Earth and Planetary Sciences at Harvard University, working with Daniel P.

[8] Rickaby began as a faculty member of the Department of Earth Sciences at the University of Oxford following her postdoc at Harvard.

Her research centers around paleoceanography and biogeochemical cycling in the oceans through deep time, with a focus on using fossil shells of marine micro-organisms as proxies to reconstruct past climate change.

[1][3][9][8] Her research group uses a variety of geochemical methods, including the analysis of trace element and isotopic ratios, to understand the biochemical behavior of paleoproxies, such as coccolithophores.

[7][1] She is also an author of the book Evolution's Destiny: Co-evolving Chemistry of the Environment and Life along with Bob Williams.