Campaign first reported on the review in October as the Crown Commercial Service told the ten agencies currently on the roster that it wants to "ensure that its commercial models are able to adapt and flex".
The government is looking to attract more regional agencies, based outside the M25.
The events will take place in Edinburgh, Liverpool and Bristol between 11 and 16 December.
Agencies currently on the roster are: Abbott Mead Vickers BBDO; DLKW Lowe; Engine; George & Dragon; FCB Inferno; Kindred; M&C Saatchi; McCann; Ogilvy & Mather; and Rainey Kelly Campbell Roalfe/Y&R.
Alex Aiken, the executive director of government communications, said: "The government has saved £1 billion for taxpayers since 2010 through its reforms to government communications, but millions of pounds of work is still available to creative suppliers who demonstrate that they can help us deliver innovative, outcomes focused and low cost campaigns.
"We‘ve introduced a more streamlined tender process for both suppliers and government communications professionals and I personally encourage agencies from all corners of the UK to attend these events and see how they can get involved."