The Corner will develop a new brand positioning for all of Jigsaw’s communications. It will also create campaigns to promote the women’s and men’s ranges in 2014.
Neil Simpson and Tom Ewart, The Corner’s founding partners, previously won the account when they were at Publicis London.
The appointment follows the arrival of Peter Ruis, the former buying and brand director at John Lewis, who became the chief executive of Jigsaw in September.
Ruis, who approached The Corner about the business, said: "The Corner have a strong understanding and passion for the Jigsaw brand. They also share my vision for its potential."
Simpson added: "Jigsaw is a gem of a business, with beautiful products and massive brand potential."