![](https://www.arthurcox.com/wp-content/uploads/2020/04/OMahony-Deirdre-1920-x-1280-768x576.jpg)
Deirdre O’Mahony
+353 1 920 1058
[email protected]
Ten Earlsfort Terrace
Dublin 2
D02 T380
Ireland
Deirdre is a partner in our Litigation, Dispute Resolution and Investigations Group, specialising in regulatory disputes and investigations and white collar crime.
Deirdre has market leading experience advising and supporting clients through interactions with regulatory bodies and enforcement agencies in Ireland and internationally, with a particular focus on contentious financial regulatory investigations and enforcement. Deirdre has advised on complex and significant investigations (internal, regulatory, criminal and cross-border) and enforcement matters for domestic and international corporate bodies, financial institutions and senior executives and on related statutory inquiries and litigation. She is an expert in white collar crime and has over fifteen years’ experience in criminal investigation, enforcement and prosecution of corporate bodies and individuals. Deirdre is an accredited CEDR mediator.
In The Legal 500: Europe, Middle East & Africa, 2024, Deirdre was ranked:
Relevant Experience
- Advising on significant enforcement investigations by the Central Bank of Ireland (CBI) under its Administrative Sanctions Procedure and related interactions with the CBI including in respect of self-reporting, statutory requests for information and documentation and remediation programmes.
- Advising on Statutory Inquiries conducted by the CBI in respect of the conduct of senior executives of a regulated firm and multiple sets of related High Court proceedings challenging decisions of the CBI.
- Advising on individual accountability and the CBI’s new Individual Accountability Framework and Senior Executive Accountability Regime (SEAR).
- Advising on matters the subject of criminal investigation by An Garda Siochana the Garda National Economic Crime Bureau (GNECB) including in relation to suspected breaches of the EU sanctions rules.
- Advising on internal investigations conducted in parallel with or arising from criminal or regulatory investigations or other regulatory processes.
- Advising corporate bodies and individuals on cross border investigations including by regulatory bodies and enforcement agencies in the EU, US, the Middle East and South Asia.
- Advising corporate entities and individuals on investigations and enforcement by and interactions with regulators and enforcement agencies including the Health and Safety Authority (HSA), Environmental Protection Agency (EPA), Food Safety Authority of Ireland (FSAI), Commission for the Regulation of Utilities (CRU) and various local authorities.
- Acting in the defence of criminal investigations and prosecutions for corporate bodies and individuals across various regimes and sectors including financial services, construction / engineering, food / agricultural, energy, pharmaceutical, waste and education.
- Advising on a range of corporate crime issues and disputes including in relation to fraud, AML, bribery / corruption, lobbying and sanctions including advices on policy, procedure, reporting and related interactions with regulatory and enforcement bodies.
Insights Blog
![Briefing](https://www.arthurcox.com/wp-content/uploads/2021/03/Briefing-47-3-768x576.jpg)
Fitness & Probity: Report published following independent review
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Building-exterior-4-768x576.jpg)
IAF/SEAR Update: Central Bank publishes final Guidance and SEAR Regulations
![Briefing](https://www.arthurcox.com/wp-content/uploads/2021/03/Briefing-47-3-768x576.jpg)
Individual Accountability Framework: Central Bank consults on Business Standards as part of CPC review
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Building-exterior-4-768x576.jpg)
IAF/SEAR Update: Central Bank publishes Feedback Statement, updated Regulations and Guidance
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Sixth-Floor1-768x576.jpg)
Update for Funds and Fund Management Companies: Central Bank publishes Feedback Statement on CP153
![Briefing](https://www.arthurcox.com/wp-content/uploads/2021/03/Briefing-49-2-768x576.jpg)
HSA and State Claims Agency Publish First Guidance on Risks of Exposure to Sensitive Content
Related Content
![](https://www.arthurcox.com/wp-content/uploads/2021/01/Briefing-42-768x576.jpg)
Fitness & Probity: Looking ahead to the independent review of the Central Bank’s approval process
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Balcony5-768x576.jpg)
UK signs the 2019 Hague Judgments Convention – a stepping stone towards a more streamlined enforcement of UK judgments in Ireland
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Sixth-Floor2-768x576.jpg)
Arthur Cox named in the 2023 Global Investigations Review 100
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Building-exterior-3-768x576.jpg)
Arthur Cox advises AviLease on acquisition of Standard Chartered’s aircraft leasing business
![](https://www.arthurcox.com/wp-content/uploads/2021/02/iStock-157418405-1920x1280LR-768x576.jpg)
Insights from the Central Bank’s Administrative Sanctions Procedure (ASP) Consultation
![](https://www.arthurcox.com/wp-content/uploads/2023/06/AC-Audio-1920-x-1280-px-790-x-430-px-768x430.png)
Individual Accountability Framework: Central Bank Enforcement Capabilities
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Stairs6-e1675182188245-709x576.jpg)
The Central Bank (Individual Accountability Framework) Act 2023 signed into Law
![Briefing](https://www.arthurcox.com/wp-content/uploads/2021/03/Briefing-49-2-768x576.jpg)
Individual Accountability Framework: Bill finalised
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Balcony4-768x576.jpg)
Arthur Cox LLP takes part in a Lex Mundi Webinar on the Sanctions Landscape
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Sixth-Floor2-768x576.jpg)
Arthur Cox named in the GIR 100 2021.
![](https://www.arthurcox.com/wp-content/uploads/2019/12/LM_ACDR_2846-768x576.jpg)
Arthur Cox wins five awards at Women in Business Law Awards Europe 2020
![](https://www.arthurcox.com/wp-content/uploads/2019/12/LM_ACDR_0906-768x576.jpg)
Arthur Cox partners shortlisted for the Europe Women in Business Law Awards 2020
![](https://www.arthurcox.com/wp-content/uploads/2019/12/Six-New-Partners-at-Arthur-Cox-768x576.jpg)
Six New Partners at Arthur Cox
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Balcony1-768x576.jpg)
An Overview of the Communications Regulation Bill 2022
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Corridor1-768x576.jpg)
The Central Bank (Individual Accountability Framework) Bill 2022
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Corridor1-768x576.jpg)
New Corporate Enforcement Authority established in Ireland
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Atrium2-768x576.jpg)
Revolving Door No More: Proposals for Reform of Lobbying Rules
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Building-exterior-1-768x576.jpg)
Practical Law Global Guide: Business Crime and Investigations – Overview
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Balcony1-768x576.jpg)
Arthur Cox contributes to the Lex Mundi Global Anti-Corruption Compliance Guide
![](https://www.arthurcox.com/wp-content/uploads/2021/11/LR-Stairs6-e1675182188245-709x576.jpg)
E-Money Institutions and Payment Institutions: Central Bank confirms its supervisory expectations
![Briefing](https://www.arthurcox.com/wp-content/uploads/2021/03/Briefing-49-2-768x576.jpg)
Insurance Reform: Minister for Finance publishes General Scheme of the Insurance (Miscellaneous Provisions) Bill
![](https://www.arthurcox.com/wp-content/uploads/2019/12/LM_ACDR_0118-768x576.jpg)
SEAR/Individual Accountability: Proposed Privilege “Safe Harbour”
![Briefing](https://www.arthurcox.com/wp-content/uploads/2021/03/Briefing-47-3-768x576.jpg)
The Corporate Enforcement Authority: An Important Step Towards Corporate Crime Enforcement Reform
![Briefing](https://www.arthurcox.com/wp-content/uploads/2021/03/Briefing-49-2-768x576.jpg)
SEAR/Individual Accountability: Proposed Changes to the Central Bank’s Administrative Sanctions Procedure
![](https://www.arthurcox.com/wp-content/uploads/2019/12/LM_ACDR_0118-768x576.jpg)
SEAR/Individual Accountability: Minister for Finance publishes General Scheme of Bill
![Briefing](https://www.arthurcox.com/wp-content/uploads/2021/03/Briefing-50-1-768x576.jpg)
SEAR: Draft legislation expected shortly
![](https://www.arthurcox.com/wp-content/uploads/2019/12/LM_ACDR_2846-768x576.jpg)
The Fraud Exception and Admissibility of “Without Prejudice” Statements
![](https://www.arthurcox.com/wp-content/uploads/2021/01/Briefing-41-768x576.jpg)
Business Interruption Insurance Series: Analysis of Court’s decision in publicans’ business interruption test cases against FBD
![](https://www.arthurcox.com/wp-content/uploads/2019/12/LM_ACDR_0517-768x576.jpg)
UK Supreme Court curbs SFO’s ability to get overseas documents
![](https://www.arthurcox.com/wp-content/uploads/2019/12/LM_ACDR_1298-768x576.jpg)
Business Interruption Insurance Series: Court finds for publicans in Irish business interruption test cases taken against FBD
![](https://www.arthurcox.com/wp-content/uploads/2019/12/LM_ACDR_0725-768x576.jpg)
Business Interruption Insurance Series: Analysis of UK Supreme Court’s Decision in FCA Test Case
![](https://www.arthurcox.com/wp-content/uploads/2021/01/Privilege-Briefing-Series_Website-05-05-768x576.jpg)
Settlement negotiations: does what’s said in the room stay in the room?
![](https://www.arthurcox.com/wp-content/uploads/2019/12/LM_ACDR_0051-768x576.jpg)
Business Interruption Insurance Update: UK Supreme Court Decision in FCA Business Interruption Insurance Test Case
![](https://www.arthurcox.com/wp-content/uploads/2023/06/AC-Audio-1920-x-1280-px-790-x-430-px-768x430.png)
Health and Safety Group Audio Briefing Series – Episode One
![](https://www.arthurcox.com/wp-content/uploads/2019/12/LM_ACDR_2039-768x576.jpg)
Criminal Justice (International Co-operation) Act 2019: broader than the Troubles?
Criminal Silence: When should you report white collar crime?
![This photograph shows a person in in an office environment. The person is blurred to suggest motion. The person could be a member of the Fintech team.](https://www.arthurcox.com/wp-content/uploads/2019/12/LM_ACDR_1600-768x576.jpg)