MGA will be run by insurer's London-based syndicate
QBE has acquired US-based underwriting agency Burnett & Co for an undisclosed sum.
The deal was announced late last year, as were four other purchases, including the acquisition of ZC Sterling Corporation.
Burnett is a managing general agency, specialising in marine and energy liabilities. It has two offices, 20 staff and annual premium in excess of $70m (£49.6m).
Burnett will be managed from London by QBE Marine & Energy Syndicate 1036, under managing director Colin O’Farrell.
Burnett will continue to trade under its existing name.