Williams has served as head of captive services at Zurich since 2014. He was responsible for delivering the company’s captive proposition, including captive fronting services and alternative risk transfer.
The hire follows a string of appointments including Steve Bauman, who joined XL from Zurich in May.
Bauman, who previously worked at Zurich, now serves as head of global programmes and the captive practice in North America.
XL Catlin also welcomed Aiden Joo as senior underwriter in its structured risk solutions business in June and Sonja Ochsenkuehn as head of global programmes in July.