The Live Group has been appointed to the Crown Commercial Service framework for a term of two years, which can be extended for a further two one-year periods.
The government's Events Planning, Delivery and Related Services agreement, launched in November 2013, included two lots for event planning, management and delivery services and also AV equipment, services, design and integration.
It is understood that 10-15 agencies and suppliers have been appointed to two rosters.
Interested parties in the tender had to submit their interest by September 2013. At the time, the Cabinet Office, via the Government Procurement Service, said it envisaged working with around 25 suppliers on the four-year contract, which it values at between £40m and £50m.
Live Group managing director Toby Lewis said: "The presence of The Live Group on both Lots is significant and we’re delighted to be part of this centralised agreement. Not least because it will be open to customers across the whole public sector, including central government departments, executive agencies, non-departmental public bodies, NHS bodies and local authorities.
"We are really hoping that the framework will fulfil all of the government’s expectations for it. We understand that public sector clients need to connect with their audiences and we can help them in a host of new and different ways."