Gráinne has been playing Irish harp professionally for over 20  years and also plays concertina. She has performed on various occasions in Germany, France, Italy, Switzerland, Brazil, Colombia, Israel, and Japan, as well as touring extensively in the United States, both solo and with various artists including the Belfast Harp Orchestra, Comhaltas Ceoltóirí Eireann and Irish Christmas In America.

Some highlights of her performance career are:

Online Performances 2020/2021
Harps in Springtime Performance
Culture Ireland Ireland Performs opening concert
Music of Mayo series (Linenhall Arts Centre, curated by Emer Mayock)
20/20 Visionaries (Trad Ireland) – presentation on the collector Edward Bunting
Philadelphia Ceili Group Festival Online
Harp Ireland ‘Harps for Hope’ performance
National Harp Day performance from Turlough House (with Laoise Kelly)

Recent live performances (pre-March 2020)
NUIG lunchtime recital, Galway, Feb 2020 (with Laoise Kelly and Kathleen Loughnane)
William Kennedy Piping Festival 2019, Armagh (with Brian McNamara, uilleann pipes)
Harp on Wight Festival, Oct 2019 (Isle of Wight UK)
Farmeigh House and Doneraile Court concert series, Aug 2019 (with William Jackson, harp)

Solo Concerts at various venues in Germany, Italy, France, Switzerland, Luxembourg, Israel, Bulgaria, Poland, Japan and throughout the USA (2000 to date)

Music Network Tour 2008, with Brian McNamara (uilleann pipes) and Eamon Ó Donnchadha (sean nós singing and flute) 

Performances with Scottish harper William Jackson
throughout USA (annual tours 2003 to date)
Germany (Irish Spring Festival Tour 2010)
Rio International Harp Festival (Rio de Janeiro, Brazil 2009, 2010, supported by Culture Ireland)
Colombia (Bogota, Manizales, Barranquilla and Quibdo, 2012)

Annual Christmas Tour in the USA, with the show Irish Christmas in America, 2005 – 2019