Gillian O'Connor
Founding & Managing Partner

T: (+353) 87 143 4901


About Gillian

Gillian is an MA (Hons) graduate of University College Dublin and has been a practising litigation solicitor for over 30 years. For 12 years she ran her own successful private practice, specializing in defending medical negligence actions on behalf of various health boards. She subsequently was a partner in another large firm dealing exclusively with plaintiff medical negligence claims. Along with Michael Boylan she was one of the founding partners of this firm and now specialises solely in complex medical negligence litigation with the firm.


Cases of note

Pandemrix - Narcolepy Claims

Gillian O'Connor is currently acting for over 80 cases of Pandemrix related Narcolepsy and Cataplexy (including the test case and other lead cases). These claims arise following the Swine Flu vaccine programme of 2009/2010 and possibly  in to 2011.

Cerebral Palsy

  • Conroy –v– Rotunda Hospital (2009). Lump sum damages award of €5,250,000 plus costs were recovered as a result of alleged negligent mismanagement of a an acute obstetric emergency (placental abruption).

  • Sheehan –v– Dr David Corr (2016). Again, in the area of Cerebral palsy arising from an Obstetricians failure to diagnose rhesus incompatibility disease (involving anti-E antibodies) during pregnancy. in 2011, a two year interim award of €1.9million was made. In 2014, after an 8 day Trial, further interim award for two years in the sum of €635,000 plus costs was made. Finally, in 2016, the case was settled for a further lump sum damages of €11.1m. Thus the total damages paid came to over €15.6 million.

  • Cian Brady –v– Rotunda Hospital (2011). Cerebral Palsy arising from negligent mis-management of a neonatal infant with symptomatic hypoglycaemia/hypothermia and not properly diagnosed. Infant suffered serious brain damage. Award of €5.5 million plus costs.


  • Malone –v– Our Lady’s Hospital For Sick Children and Others (2009). Complex action concerning acquired neurological injury of an infant resulting from the excessive use of chemotherapy in treating childhood leukemia with an award of €2.7 million and costs.

  • B –v– Nicholas Jermyn (2008). Proceedings were initiated on behalf of the Plaintiff for failure to diagnose breast cancer, resulting in mastectomy and removal of spleen. The case settled 2 months before Trial for the sum of €400,000.00 plus costs.

  • F –v– Health Service Executive (2010). Failure to diagnose breast cancer resulting in mastectomy, depressed immune system and serious infection, causing malignant otitis externa and osteomyelitis with an award of €750,000 and costs.

Acquired Brain Injury

  • Lennon –v– Health Service Executive. Interim award in February 2011 was €2.4 million and costs. April 2013, further interim award for one year only €310,000 plus costs. June 2014 – Third interim award for three years –€895,000 plus costs. July 2017, Plaintiff Receives 4th Interim Award Of €1.6 million. Total interim damages recovered to date amount €5.2 million.


Membership of organisations