FCM Travel Solutions is now operating under the Ci Events brand.
Its Birmingham office has been rebranded and its London staff have joined colleagues in the Ci Events office.
Ci Events general manager UK Europe Penny Lion said: "The FCM groups team is highly experiences in the events industry and we will benefit greatly from joining forces to develop the Ci Events business and brand in the UK."
The agency's backing by parent company Flight Centre would allow it to continue building strong relationships with airlines, hotels and transport providers, added Lion.
Ci Events was established by Flight Centre in Australia and New Zealand in 1986 and now turns over about £50m annually.
It launched in the UK in 2006 and opened an office in China in 2007.
Thomson Reuters, IBM, La Senza, Wagamama and Telstra are among its UK clients.
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