In that capacity she is credited as having successfully lobbied for the introduction of legislation to protect local authority archives.
[4] During her time at the Hunt Museum Teehan successfully led the organization through a government enquiry established following an allegation made by the Simon Wiesenthal Centre Paris that items from the Hunt collection were looted during the Nazi era.
Teehan established a major provenance research project which proved ultimately that the allegations were unfounded.
[1] She was appointed by minister Síle de Valera to the board of the Heritage Council from 2000–05 and was reaffirmed until 2008.
Teehan has written extensively on the history and artworks of the Honan Chapel in UCC,[5][6] as well as on fine and decorative arts, and cultural management, including monographs on Ogham inscriptions, Seán Keating, Louis le Brocquy and Jack B.