Mark Cullen, appointed in October 2025 as the new Chief Executive Officer (CEO) of the Health and Safety Authority (HSA), had been serving as Interim CEO since earlier last year, and took up the role following his appointment by the Board of the HSA after an open and competitive recruitment process.
Over the course of his 25-year career with the HSA, Mark Cullen has held a wide range of leadership and operational roles, developing a deep knowledge of workplace health and safety as well as the HSA’s wider regulatory responsibilities in chemicals, product safety and national accreditation. A qualified civil engineer, he previously worked in the UK construction industry.
Fergal McKevitt, NISO President, said that Cullen’s extensive experience and strong record of leadership within the HSA will serve the Authority well. “We look forward to continued collaboration between NISO and the HSA in promoting workplace safety and maintaining Ireland’s high standards in occupational health and safety.”
Peter Burke TD, Minister for Enterprise, Tourism and Employment, congratulated Mark Cullen on his appointment as CEO. Mark’s appointment will ensure that the Authority will continue to deliver on its responsibilities which are vital not only for worker safety and health, but also for business confidence, consumer protection and maintaining high standards across our economy.”
Patricia Byron, Chairperson of the HSA, added: “Mark brings extensive experience, proven leadership and a deep understanding of the organisation’s diverse mandate. Mark’s knowledge and vision will be key to ensuring that the HSA continues to deliver effectively across its wide remit in protecting people, enabling enterprise and, through effective accreditation, strengthening Ireland’s international reputation for high standards.”
Mark Cullen said: “Having worked with the organisation for more than 25 years, I have a deep understanding of both the breadth and importance of our remit – from protecting workers’ health and safety to ensuring chemicals and products are used and managed safely and delivering a national accreditation service that underpins quality and trust.”
