The agency will work on a ú2m TV and press campaign in the autumn to promote the range, which includes ready meals, potatoes and desserts.
The incumbent, Leo Burnett, which handles Heinz's tinned-food lines, declined to repitch for the account.
Last year, Heinz announced that it was to sell off its non-core businesses, including Weight Watchers, to concentrate on its key grocery lines.
However, the company failed to attract a sufficient offer for the brand and has appointed ex-HP managing director John Garrett to grow the business by investing in new products.
Heinz hired Clemmow Hornby Inge at the end of last year to handle its Weight Watchers' range of non-frozen foods which includes yoghurts and cereals (Marketing, 8 November). JWT holds the account for Weight Watchers meetings.