Siobhan O’Brien

With more than 20 years of experience in cyber insurance and professional liability across global markets, Siobhan O’Brien leads the growth and strategy of MSIG USA’s cyber insurance portfolio, reflecting the company’s commitment to providing innovative solutions that meet the growing complexities of cyber threats in a globalized economy.

Prior to joining MSIG USA, Siobhan served as managing director and Cyber Center of Excellence leader at Guy Carpenter, where she spearheaded cyber initiatives across international and specialty markets. Earlier in her career, O’Brien held leadership roles at Marsh UK Limited, including UK cyber placement leader, where she developed customized cyber insurance programs for clients facing diverse global risks. She has a bachelor’s degree in Marketing from the Dundalk Institute of Technology and is an Associate of the Chartered Insurance Institute.