Tierney was born in Dublin in 1963 and studied Psychology and Philosophy at University College Dublin. She moved to London in 1985, where she worked in many areas, from theatrical make-up artist to museum administrator. After several years teaching in Spain (Valladolid and Granada), and Ireland (Dublin) she is now settled in London. Her poetry has appeared in anthologies from Donut Press, Ondt & Gracehoper and Unfold Press.
She has been placed in a number of national poetry competitions including the Brendan Kennelly Poetry Competition 2007, the Strokestown Poetry Competition 2006, the Bridport in 2005 and 2002, and the 2001 TLS Poetry Competition. Her pamphlet Dream Endings (Rack Press, 2011) won the 2012 Michael Marks Award.
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