Tokio Marine HCC International (TMHCCI), a subsidiary of the Tokio Marine HCC group of companies, has announced the appointment of Gülsah Dagdelen as Head of Cyber – International, effective 1 July 2026.
Dagdelen succeeds Xavier Marguinaud, who has served in the role since 2020 and helped develop TMHCCI’s Cyber offering from a single line within Financial Lines into a dedicated international practice over the past decade.
In her new role, Dagdelen will lead TMHCCI’s Cyber team as the business builds on a decade of specialist underwriting expertise and continues to expand its international practice.
She brings nearly two decades of technical and commercial underwriting experience, having joined the company in 2013 as a Financial Lines Underwriter before moving into Cyber in 2019.
Most recently, Dagdelen served as Cyber Underwriting Manager – Continental Europe, Middle East and Africa.
TMHCCI’s Cyber team has grown steadily alongside increasing demand for cyber insurance and now comprises 22 specialists, including a dedicated Cyber Security team.
TMHCCI said Dagdelen’s appointment marks the next chapter for a team that has built a strong reputation for disciplined underwriting, consistency, and long-term broker and client relationships.
Thibaud Hervy, Chief Executive Officer – TMHCCI, said, “Gülsah has been central to building our Cyber practice, and this appointment reflects both her expertise and the strength of the wider Cyber team. Her promotion underlines the continuity of our approach, the trust she has earned across the market, and the important role she will play in the continued growth of our international Cyber business.”
Dagdelen commented, “I’m proud of what we’ve built in Cyber and excited to lead the team into this next phase. As the cyber risk landscape becomes more complex, our focus remains on disciplined underwriting, close broker and client relationships, and helping businesses navigate emerging and evolving threats. I would like to thank the TMHCCI team for their continued trust and support, and I look forward to building on such strong foundations.”
Henk Bakker, Managing Director – Financial Lines, Cyber and Transaction Risk, TMHCCI, said, “The Cyber team has built a strong reputation across the market through its underwriting expertise, consistency and specialist approach. I am confident Gülsah is the right person to lead its next phase of growth. We also thank Xavier Marguinaud for his significant contribution to TMHCC and to the Cyber team over the past ten years. His expertise and leadership have been a key asset to the business, and we wish him continued success in his next role.”
