People Moves: Aon Promotes Shukri as UK Reinsurance Client Services Leader; Blenheim Underwriting Taps Stratton-Thomsett From MS Amlin as Casualty Underwriter

This edition of International People Moves details appointments at the broker Aon and the Lloyd’s managing agent Blenheim Underwriting.

A summary of these new hires follows here.

Aon Promotes Shukri as UK Reinsurance Client Services Leader

Insurance broker Aon plc announced that Mehmet Shukri has been appointed head of UK Client Services for Aon’s Reinsurance Solutions, effective immediately.

He previously served as the deputy head of UK Claims and Client Services for Aon’s Reinsurance Solutions.

Based in London and reporting to Steve Clark, global head of claims and client services advocacy, Shukri will accelerate client value in line with the firm’s global Reinsurance Solutions advocacy proposition, ensuring all Aon clients receive expert claims support.

“Our clients are placing increasing importance on claims and accounting services, for good reason,” commented Leonora Siccardi, chief claims officer for Reinsurance Solutions at Aon. “Mehmet’s appointment reflects our continued investment in leaders who are dedicated to delivering the best experience aligned to their needs, as well as developing new and innovative solutions in a challenging macroeconomic and geopolitical environment.”

***

Blenheim Underwriting Taps Stratton-Thomsett From MS Amlin as Casualty Underwriter

Blenheim Underwriting, the Lloyd’s managing agent and subsidiary of White Bear Capital, announced the appointment of Alex Stratton-Thomsett as casualty underwriter, effective Jan. 8, 2026.

In his new role, Stratton-Thomsett will join David Barber, senior casualty underwriter, in the build out of the MGA casualty account.

Stratton-Thomsett brings with him 25 years of experience and expertise in the casualty market, joining from MS Amlin, where he was lead underwriter, U.S. casualty. The role reunites him with Barber after a successful 14 years together at Chaucer.

“We’re thrilled to welcome Alex to the team, marking a significant step forward in the expansion of our casualty MGA book and making it one of the stronger units in this specialist marketplace,” commented Barber. “It’s another endorsement of our independent structure, which continues to attract top-tier underwriting talent, that can sometimes get lost in larger organizations.”

Topics Underwriting Leadership Reinsurance Aon Casualty Mississippi