After some years as a partner in a large insurance litigation firm in the City, Mariel established Mariel Irvine Solicitors in 2002. It is a boutique practice based in London specialising in:
- data protection
- employment
- stress at work and psychiatric injury
- inquests and inquiries.
The firm focusses on the needs of a small number of organisations and individuals. It provides a highly responsive and dedicated personal service.
Mariel is ranked in the employment section of the Chambers and Partners UK Directory with the following comments from clients:
“Her ability to grasp details and complex issues and translate them through into reasonable understandable legal advice really stands out” (2026)
“She has exceptional talent when dealing with employment disputes” (2025)
“She provides an excellent service from start to finish” (2024)
Mariel wrote a book: A Practical Guide to Enforcing Data Protection Rights and Compensation for Data Breaches published by Law Brief Publishing in 2023.
Examples of some of Mariel’s cases:
- outsourced data protection officer to one of America’s fastest growing companies in 2024
- three judicial reviews of recent amendments to public service pensions on behalf of the police
- representing managers and senior executives in discrimination claims in the Employment Tribunal
- representing managers and senior executives in claims in the civil courts for psychiatric injury arising from stress at work
- advising senior executives on how to exit their employer
- representation at the Manchester Arena Inquiry on behalf of one of the police core participants
- drafting response to sunset clause consultation on Scrap Metal Dealers’ Act 2013 on behalf of an insurer
- advising Lloyds Syndicate on amendments to policy wording covering assault claims and the “deliberate acts” exclusion
- regular webinars for the Chartered Insurance Institute, most recently on amendments to the Data (Use and Access) Act 2025.