Liberty Mutual Insurance Group, a global insurer providing commercial and personal insurance products and services, has appointed Gareth Rees as Global Lines Leader for its Global Transaction Solutions (GTS) business, effective from 1 July 2026.
Rees will be based in London and will report to Thomas Leahy, Global Product Leader – Financial Lines at Liberty Mutual. He has played a key role in developing GTS’ global business. He spent the past six years as Chief Underwriting Officer, following a series of senior roles after joining the company in 2015.
As Global Lines Leader, Rees will collaborate with GTS teams across EMEA, APAC and the Americas to further strengthen the business’s transactional liability proposition and support its future direction.
A former corporate lawyer, Rees has extensive experience advising on mergers and acquisitions across multiple sectors. Liberty Mutual said his new responsibilities will include advancing GTS’ strategic objectives as the business enters its next stage of development.
Leahy added: “We are delighted to announce Gareth’s new role as leader of GTS. He has spent the past decade helping to build out our global team of industry-leading transactional risk experts. Under his leadership, we are confident GTS will continue to provide specialist expertise and agile solutions to its clients and brokers in an increasingly complex transactional risk environment.”
Liberty Mutual said Rees succeeds Rowan Bamford, who has left the business to pursue new opportunities.
