After completing her PhD, she was an honorary senior research associate at the University of Bristol until 2020. She continued her work on Viking Repton; including isotopic analyses of the human remains, sequencing ancient DNA from samples, and "reassessing some of the unpublished artefacts".
Her 2021 book River Kings: A new history of the Vikings from Scandinavia to the Silk Roads was described as "an engaging introduction to the study of the Vikings" by the Times Literary Supplement. Her 2023 book The Bone Chests: Unlocking the Secrets of the Anglo-Saxons was called "an enthusiastic guide through England's early medieval past" by History Today.
In July 2024, she was awarded the Dan David Prize for "Archaeology of the Viking Age and public archaeology".
Her archaeological work was featured on eight episodes of BBC Two television series Digging for Britain. She is also a recurring presenter for the series.
Jarman presents the history podcast The Rabbit Hole Detectives with Richard Coles and Charles Spencer, 9th Earl Spencer. Together they wrote The Rabbit Hole Book, published by Michael Joseph in 2024.
Personal life
Jarman was previously married, and has two children. She was diagnosed with multiple sclerosis in 2016.
Jarman's relationship with Charles Spencer, 9th Earl Spencer, was publicly confirmed in 2024 while he and his third wife, Karen Spencer, were filing for divorce. In October 2024, she brought a claim against Karen Spencer for alleged misuse of private information relating to her multiple sclerosis diagnosis. The claim was settled in December 2025 via a Part 36 provision, with Charles Spencer ordered to indemnify some of the costs as part of the Spencers' divorce arbitration.
On 15 May 2026, Jarman married Spencer in Sedona, Arizona, U.S. Following her marriage, she is styled The Right Honourable The Countess Spencer, and addressed Lady Spencer.
