Quiet Storm will be working on a range of above-the-line activity, including launching new products, to promote the brand, which has been dormant for some years. The agency is understood to be already working on creative concepts using an annual budget that is thought to be around £3 million.
McCann retains the main Kerry Foods account, which includes Wall's and Richmond sausages. Universal McCann continues to handle media for Mattessons.
The hiring comes after Kerry Foods appointed the direct agency Chilli to handle below-the-line activity for both Mattessons and Richmond.
The Quiet Storm managing and creative director, Trevor Robinson, said: "We've really enjoyed working on the pitch, and are very excited about this fantastic opportunity. Mattessons has a fine brand heritage and although there hasn't been large-scale promotional activity for several years, we know that Kerry Foods is continuing to develop the brand strategically."
Kerry Foods' brands business managing director, Paul Llewellyn, said the company had invested £5 million in Wall's and Richmond in 2001 and would continue to invest in its brands.
"Next year will see continued development for all our brands, with Wall's returning to TV. We have decided to split the creative business between McCann and Quiet Storm in order to give all our brands the focus and direction each of them deserve and need," he said.