Consolidator confirms senior management appointments.
Giles managing director Michael Quinn is set to leave the business next year. He is being replaced by Andrew Watson.
Another senior member of staff, Derek Gardner, who moved from finance director to the broker's M&A team earlier this year is also leaving the business.
Gardner has been replaced by Paul Matson, a former finance director of Coral Bookmakers.
Giles also confirmed the appointment of Mark Chambers as its new deputy managing director. He also joins from Coral Bookmakers, where he was recently finance director.
The departures will be seen as a blow to Chris Giles, chief executive of Giles, who has this year purchased more than 15 brokers in an attempt to create a business with a gross written premium of £1bn.
Giles has been in tough negotiations with a number of insurers over commission levels in recent months.
Quinn is understood to have been central to discussions with insurers following the heated talks. He joined Giles in 2003. Quinn declined to comment