2026 — Idir Neamh agus Talamh, Marino Church Bantry.

2025 — Kin (Bespoke Set Design for Live Performance of Rita Lynn) Arundels by the Pier, Ahakista Cork.

 2021 — K Fest Arts Festival, Killorglin, Co Kerry.

2016 — Open House 6, Sirius Arts Centre, Cobh.

2015 — Bar Pigalle (Solo Exhibition) – Barrack Street, Cork.

2014 — Rabbit Hole Project in conjunction with Co-Action service users, Bantry, Cork.

2014 — Can't Fly (Solo Exhibition) – Trawl and Trend, Bantry, Cork.

2013 — The End is the Beginning, Unit H, the Market Gallery, Market Studios Smithfield Dublin, Curated by Louise Marlborough.
https://www.louisemarlborough.com/the-market-studios

2013 — Body and Soul, Electric Picnic. Stradbally Co. Laois.

2013 — Art and Style, Brown Thomas Windows, Patrick Street, Cork. Curated by Angela O' Kelly (Current Head of Design at NCAD, Dublin).
https://arts.mtu.ie/viewEvent?id=155

2013 — Liminal (Crawford Degree Show), Sharman Crawford Street, Cork.
" There is Zest and Humour in the work of Mary O' Mahony" – review by Peter Murray, Director of Crawford Art Gallery.
https://www.irishexaminer.com/lifestyle/arid-20233890.html

2013 —Art in the Making, Wandesford Quay Gallery, Cork. 2013

2012 — Listed, Old Fas Building, Cork.

2011 — Memento 3 – International Collaborative Exchange Project 
James Barry Exhibition Centre, MTU, Cork;
HBK, Braunschweig, Germany;
Sint Lucas, Belgium;
EASD, Valencia, Spain; ;
UWE, Bristol, UK;
Wimbledon College of Art, UAL, London;
ArtEZ Enschede, Netherlands.

2010 — Backstory, St Peters Church, Cork Vision Centre.