Ireland’s computer and network security sector plays a foundational role in protecting both domestic organisations and global enterprises operating across Europe. The country hosts a mix of specialist cybersecurity firms, managed detection and response providers, and advisory services that help organisations meet regulatory requirements while strengthening operational resilience. The leaders in this space combine hands-on technical expertise with the ability to build scalable security programs, helping clients move from reactive defense to structured, measurable cybersecurity maturity.
Rida Villanueva — Founder and Head of Cybersecurity Services, Cyberhealth
Rida Villanueva leads Cyberhealth, delivering cybersecurity advisory services to highly regulated sectors including financial services, healthcare, and digital infrastructure. Her experience spans cyber risk programme implementation, third-party risk management, and regulatory compliance aligned with frameworks such as ISO 27001, HIPAA, and NIS2. Earlier roles in professional services and global enterprise environments gave her direct experience building vendor risk programmes, conducting security assessments, and guiding organisations through complex regulatory requirements.
Patrick Slattery — Senior Director of Cybersecurity Operations, Arctic Wolf
Patrick Slattery oversees cybersecurity operations at Arctic Wolf, where he leads managed detection and response delivery, threat intelligence, and operational strategy. His career includes leadership roles across global cybersecurity vendors, where he helped build and scale security operations teams supporting enterprise clients. His expertise spans incident response, threat hunting, and operational leadership, with a focus on delivering measurable security outcomes and improving organisational cyber resilience.
Laura Ruusuvuori — Lead Technical Writer, User Experience Designer, and Chief Information Security Officer, 42Crunch
Laura Ruusuvuori serves as Chief Information Security Officer at 42Crunch while also leading technical documentation and user experience initiatives. Her background combines security leadership with deep expertise in technical communication, enabling her to improve how security controls are implemented and understood. She plays a key role in ensuring that security architecture, documentation, and product design align to support secure software development and operational resilience.
Mary Donnelly — Chief Information Security Officer and Cybersecurity Consultant, Ergo
Mary Donnelly serves as Chief Information Security Officer and cybersecurity consultant at Ergo, where she helps organisations implement structured information security programs aligned with international standards such as ISO 27001. Her career spans governance, compliance, and enterprise security transformation, with experience guiding organisations through regulatory alignment, risk management, and operational security improvements. Her background in quality management and compliance strengthens her ability to build sustainable security frameworks.
Bronagh O Sullivan — Chief Operating Officer and Dedicated Chief Information Security Officer, Binarii Labs
Bronagh O Sullivan serves as Chief Operating Officer and Dedicated Chief Information Security Officer at Binarii Labs, combining executive leadership with responsibility for cybersecurity strategy and operational delivery. Her experience spans software quality, operational strategy, and security leadership, giving her a strong foundation for building secure and scalable technology environments. She focuses on aligning cybersecurity with business operations while strengthening organisational resilience.
The Cybersecurity Leaders Strengthening Ireland’s Frontline Defences in Computer and Network Security
Ireland’s computer and network security sector continues to grow in importance as organisations face increasing regulatory pressure and evolving threat environments. Leaders in this space play a critical role not only in protecting infrastructure and data, but in helping organisations build long-term resilience. Their work ensures that cybersecurity becomes a sustained capability rather than a reactive function, strengthening trust across Ireland’s digital economy.