Aon will close six regional offices around the country as part of its UK restructure.
Offices in Canterbury, Cardiff, Liverpool, Norwich, Plymouth and Shrewsbury will be closed in the next 12 months.
Aon said "relatively few job losses" would occur as a result of the office closures. It added: "Any that do arise will form part of the proposed 750 employee number reduction announced on 5 October."
The company said in 2006 it would deploy staff in a number of ways, including home working and moving staff to "convenient alternative locations".
Philip Gore-Randall, one of Aon's main board directors, said: "We want to have new ways of working in place so that we can expand our activities into new locations and not be restricted by needing to have a physical presence."