She has served as an external examiner for theses in the English and History Faculties at the Universities of Oxford, Cambridge, Edinburgh, New South Wales, Galway, UCD and Maynooth.
The council also advises the government on research-related policy issues, as well as lobbying ministers in Dublin and Brussels, and was the first funding agency in Ireland to publish a gender strategy[28] and introduce gender-blind assessment.
[29] From 2015 to 2020 Ohlmeyer was Director of the Trinity Long Room Hub Arts and Humanities Research Institute, having previously worked with colleagues to develop the concept and secure funding (2008).
[46] Ohlmeyer is the author or editor of numerous articles and 13 books, including Volume 2 of The Cambridge History of Ireland, published in 2018.
[47][48] The Cambridge History of Ireland was launched in Dublin by President Michael D. Higgins,[49] in London by former UK Prime Minister John Major[50] and in Washington DC by President-elect Joe Biden.
[51][52][53] In 2020 she published an edition of Edward Hyde, 1st Earl of Clarendon's A Short View of the State and Condition of the Kingdom of Ireland (Oxford, 2020).
In 2023 she published Making Empire: Ireland, Imperialism and the Early Modern World, based on James Ford Lectures given at the University of Oxford in 2021.
[54] To date, Ohlmeyer has been the Principal Investigator (PI) or co-PI for 25 research and research infrastructure projects, with awards totalling €22 million including:[55] Ohlmeyer was closely involved in the development and launch of History Scotland, an illustrated and interdisciplinary quarterly magazine that is aimed at members of the general public.
[71][72][73] Ohlmeyer has published 13 academic books (2 monographs and 11 edited or co-edited),[79] over forty articles[80] and was one of the four co-editors of the Irish Manuscripts Commission The 1641 Depositions in 12 volumes (2014–20).