She will remain at the NFB until April 2014 when she starts her new role.
Julia Evans has been chief executive of the NFB since January 2006. Before that, she was a director of the Strategic Rail Authority.
NFB chairman Paul Senior said: “Julia has taken the federation into ever more ambitious territory in her years at the helm. In a difficult economic climate, she led and inspired her team to keep up the successes of the NFB, and to provide sterling support, advice and services to members. Julia has led from the front, and we are very sad to see her go but congratulate her on her new opportunity. We wish her every success and are pleased that she remains in the industry and will continue to contribute to its recovery and success.”