Labour MP Shane Jones will leave politics at the end of next month, saying he had come to the conclusion over Easter that it was time to go.
Mr Jones said he had told Labour leader David Cunliffe of his decision as well as the Party President Moira Coatsworth.
He has been in talks with Foreign Minister Murray McCully for some time about a possible role in an international fisheries management role and expected that to go through.
He said he would leave at the end of next month after reflecting over Easter about his future.
TV3 reported Mr Jones would be taking on a role of Pacific Economic Ambassador, created by the National Government especially for him.