The media regulator has invited tenders from agencies for a brief that covers media strategy and buying for individual campaigns.
Ofcom said the buying task would cover national and regional press, radio, TV, on-line, outdoor and direct mail for occasional "high-profile" consumer campaigns. The winning agency will also buy space for Ofcom's recruitment advertising.
The regulator currently uses Media Campaign Lim-ited as its media agency.
The deadline for tenders for the account is 17 March, with shortlisted agencies pitching in April. The contract to be awarded will run for a period of up to four years.
Ofcom has broad responsibility for the communications industry, covering television, radio and telecommunications. The body was formed in 2003 and has since conducted a major review of the telecoms industry as well as overseeing the ITV merger and its after-effects.