AMG group managing director Kevin Wood has been appointed chief operating officer in a management shake-up at the loss adjuster.
And former Euler Hermes boss Richard Webster has been appointed chief executive.
The company said the changes were designed to provide a platform from which the newly-enlarged group could grow.
AMG acquired loss adjuster Carr Greenwood Smith in March and Sigma Claims Solutions in 2006.
Chairman Martin Long said: “AMG is now a much larger, more complex business facing new and fresh challenges.
“These recent changes are a result of a major review and are designed to take AMG on to even greater success. We are absolutely focused on making AMG the best option for our insurance customers and their policyholders.”
In his new role, Wood will focus on the day-to-day operation of the group including technical expertise and claims handling processes. He will continue as group managing director until the New Year.