MSIG USA names Siobhan O’Brien head of cyber insurance
- June 21, 2025
- Posted by: Kassandra Jimenez-Sanchez
- Category: Insurance
MSIG USA, an insurance subsidiary under MSIG Holdings, has announced the appointment of Siobhan O’Brien as head of cyber insurance.
With over two decades of experience in cyber insurance and professional liability, O’Brien will lead the expansion of the company’s cyber insurance portfolio, developing innovative solutions to address the evolving cyber threats businesses face in a globalised economy.
Peter McKenna, CEO of MSIG USA, commented: O’Brien’s expertise and global perspective are invaluable as we develop our cyber capabilities. The digital landscape is rapidly evolving, and businesses face new challenges that require adaptive and effective solutions.
“With O’Brien’s leadership, MSIG USA is uniquely positioned to provide comprehensive strategies that protect clients and help them achieve their goals in today’s technology-driven world.”
With extensive international experience in cyber strategy and development, O’Brien joins MSIG USA from Guy Carpenter, where she served as Managing Director and Cyber Center of Excellence leader.
Her previous roles include UK cyber placement leader at Marsh UK Limited, where she developed bespoke cyber insurance solutions for clients with diverse global risks.
Hiro Morimoto, Senior Executive Officer, Mitsui Sumitomo Insurance Co., Ltd, Chairman and CEO, MSIG Holdings (U.S.A.) Inc. added: “Cyber risk is a dynamic and increasingly significant challenge for businesses around the world. O’Brien’s deep expertise in managing complex, global risks will be a critical asset as we continue to enhance our offerings.
“At MSIG USA, we are committed to providing tailored solutions that address the ever-changing needs of our clients, and O’Brien’s leadership will be instrumental in fulfilling that mission.”
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