In addition to LIMF, Full Fat has recently picked up accounts for festivals No Tomorrow, Brownstock, Truck, Y-Not, Croatia Rocks and Fresh Island.
The new wins sit alongside the agency's retained clients Wychwood Festival, Standon Calling, Hideout and Sunscape.
Yaw Owusu, curator of the Liverpool International Music Festival, said: "LIMF prides itself on its diverse and dynamic offer of free and ticketed events which will see a mix of household names and up-and-coming artists take to the stage in front of an audience of tens of thousands.
"We’re confident that with Full Fat’s vast music festival experience and enthusiasm for this year’s programme, there will be an increased national awareness for LIMF and Liverpool’s immense musical credentials."
Full Fat managing director Dan Walsh said: "The Full Fat team has spent 10 years creating the ultimate approach and solution for major event media management and the addition of no less than eight new major event clients to our already burgeoning roster is testament to that."
The agency recently completed a PR campaign for Winterville, which took place in London over the Christmas period.