Peter Butler has joined retrocessional underwriter Alwen Hough Johnson.
Butler was previously a non-marine underwriter with R J Kiln at Lloyd's.
He is reported to have responsibility for technical risk analysis and product development.
AHJ chairman Hugh Price said: "This is another exciting development for our business as we look to enhance the service we provide to clients.
"Peter's wealth of experience will place us in a much stronger position to advise clients of the best solutions."