Ms Cullen joins the firm with more than 30 years’ experience in technology leadership, including her most recent role as chief information officer (CIO) and executive team member at Vodafone Ireland.

She has led major transformation programmes across network, IT and digital domains, and currently serves as a non-executive director of .ie and Kinia.

McCann FitzGerald said the creation of a CTO role reflects its evolving approach to leadership in a digital-first legal environment.

Ms Cullen will have responsibility for shaping and executing the firm’s technology strategy, ensuring that digital capabilities continue to enhance client service, operational excellence and long-term growth.

Stephen Holst, the firm’s managing partner, said: “The CTO role is central to McCann FitzGerald’s business strategy, and Mairéad’s appointment marks a pivotal moment in our digital journey.

“As a member of the executive team, she will play a key role in shaping the firm’s future, from harnessing AI and emerging technologies to strengthening cybersecurity and enabling smarter ways of working.

“Her experience and leadership will help ensure our digital infrastructure and platforms meet the changing needs of our clients and our people.”

Commenting on her appointment, Ms Cullen said: “Emerging technologies like AI are reshaping how legal services are delivered, creating new opportunities to enhance value for clients and transform how firms operate.

“McCann FitzGerald is rightly embracing this shift by investing in intelligent, scalable platforms and embedding innovation and greater digital resilience into every part of the business.

“This is an exciting time for the firm, and I look forward to working with the excellent team here.”

Her appointment follows the firm’s recent appointment of Maedhbh Clancy as partner and head of knowledge, which it said reflected its continued investment in knowledge management and client service excellence.