The move follows a reorganisation of the body’s communications function and the recruitment of a full-service agency, Marsteller, last year.
The idea for a roster was first mooted by director of corporate affairs Helen McCullum a year ago, but was put on hold until Marsteller was recruited.
Chief PRO Sasha Chisholm said: ‘Last year was about getting the structure in place, and this follows on from that.’
Agencies are now being asked to submit their bids for the roster. It is hoped that between four to six agencies will be appointed, and that the roster should be in place by May.
Likely campaign topics for roster agencies to help with include flood warning, fly tipping, recycling and river management.
A key piece of campaigning is the agency’s flood awareness work, which has an annual push each autumn, when the risk of flash flooding is greater.