Catherine Allen


Catherine is a partner on our Administrative and Public Law team, with broad experience in advising on public law issues. Catherine has a particular focus on the powers, functions and duties of public bodies and has been involved in several legislative drafting projects.

Catherine leads MHC's professional regulatory team, advising on the conduct of investigations. Catherine also advises witnesses appearing before statutory and non-statutory investigations and inquiries.

Catherine is a contributor to MHC’s Freedom of Information Sourcebook, now in its third edition. Catherine is also part of MHC's privacy and data security practice, focusing on public sector privacy.


  • Public and Administrative Law
  • Regulatory Law
  • Professional Disciplinary Law
  • Litigation
  • Freedom of Information and Data Protection

German Practice:

In addition to her administrative and public law practice, Catherine Allen assists many German clients of Mason Hayes & Curran on a variety of legal issues. She works closely with other departments of the firm in this regard. She actively maintains links with German legal and commercial entities, and is an honorary member of the German Irish Lawyers and Business Association.

Representative Matters

  • Advising numerous public and regulatory bodies in relation to their powers, functions and duties, including complex issues of statutory interpretation.
  • Advising a number of professional regulatory/disciplinary bodies such as the Irish Auditing and Accounting Supervisory Authority and the Nursing and Midwifery Board of Ireland in relation to matters falling under their remits.
  • Advising private sector bodies in relation to the requirements of the Regulation of Lobbying Act 2015.


The legal 500, 2017

Catherine is recommended for ‘HSE service arrangements’. 

The legal 500, 2015

"Very informed"

Speaking Engagements & Teaching

  • Regular speaker at conferences and MHC events on Public & Administrative Law and FOI.
  • Appearance on RTE 1 (Ireland's national TV broadcaster) Morning Edition - speaking about FOI (February 2013)
  • Google+
  • LinkedIn

Areas of Expertise

Public & Administrative Law Charity Law & Not-for-Profit Dispute Resolution General Data Protection Regulation

Professional Memberships

Association of Regulatory and Disciplinary Lawyers

German Irish Lawyers and Business Association (Honorary Member)

British German Jurists' Association


University College Dublin, BCL European Legal Studies

University of Würzburg, Germany, LLM

Honorable Society of King's Inns, Advanced Diploma in White Collar, Corporate and Regulatory Crime

Honorable Society of King’s Inns, Advanced Diploma in Legislative Drafting.