He said MFAT had to deal with fixed income and rising costs. " ... We believe we need to find savings in the order of $40 million."
He also defended the so-called 'change programme' as essential for a modern foreign service - but he and foreign minister Murray McCully have indicated a backdown on proposals such as those to cut allowances of diplomats serving overseas after concerns staff would walk away from their jobs.
Mr Allen said some allowances would remain, but acknowledged that the remuneration was a concern to some staff.
Mr McCully made his views on the proposals clear to Mfat leadership, saying some of the proposed cuts were "at the ambitious end", especially those relating to remuneration. He said Mr McCully had told MFAT to move with care and pay heed to feedback.
In a survey by diplomats' union - the Foreign Service Association - soon after the cuts were announced, almost three-quarters of staff based overseas said they were considering resigning or returning to New Zealand.
Mr Goff asked how the ministry would attract good staff if diplomats were put on fixed term contracts overseas with no guarantee of a job upon their return to New Zealand.
Mr Allen said it was the same model used by most other organisations - in the private and state sectors. "Which is to appoint people to a role, to pay them for the role they're doing and to allow them to back themselves in the development of their career in applying for subsequent roles."
He said if they were not successful in applying for another role within the ministry, they would be put into a "surge pool" of people to be deployed where needed until they secured another appointment.