Byrne Wallace Shields LLP‘s white-collar crime and regulatory investigations team is noted for its ability to act on both the prosecution and defence sides of complex criminal and regulatory investigations. The team designs proactive corporate defence strategies and has specific expertise in cybercrime criminal investigations, as well as broader experience in contentious civil enforcement work. A standout feature of the practice is its deep involvement in the public sector, including drafting enforcement legislation. Jon Legorburu, who co-heads the group, has extensive experience in assisting clients through major internal investigations, with further support from Eoin Mac Aodha, who joined in September 2025. Also leading the group is Sean O’Donnell, who is a name to note for contentious regulatory work.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘Byrne Wallace Shields have a wealth of experience in this field and are able to lend that experience to all kinds of white collar issues.’
- ‘Sean O'Donnell is an expert in his field who is able to navigate complex issues with ease. He has experience in every class of complex white collar dispute.’
- ‘Sean O'Donnell and Ben Grogan have excellent attention to detail. They are efficient and extremely responsive. There is never any issue contacting them and they provide a very thorough service.’
- ‘The individuals we work with are engaging and responsive to our correspondence and to our requests for advice.’
- ‘Ben Grogan and Sean O'Donnell are extremely attentive and provide an excellent service to clients. They are knowledgeable in the area of white collar crime and have experience in prosecutions in both District Court and Circuit Court.’
- ‘Knowledge, responsiveness, professionalism, good manners.’
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Eoin Mac Aodha
Practice head
Jon Legorburu; Sean O'Donnell
Other key lawyers
Eoin Mac Aodha; Ben Grogan