More than 100 Department of Conservation workers are facing redundancy by the end of the year.
Office-based staff in Wellington and several regional centres will be affected. A decision will be made in the next three months about which roles will be lost.
The news comes after yesterday's announcement that jobs will also be lost in the Defence force and Foreign Affairs.
Forest & Bird Conservation Advocate Nicola Vallance said the decision to cut jobs at DOC contrasts with the government's decision in April to nearly double the number of people in the Ministry of Economic Development's unit aimed at expanding the oil and minerals industries.
"New Zealanders showed last year during the battle to save our Schedule 4 protected lands from mining that we love our conservation land and want it protected from mining and other threats," she said.
"Good decision-making about the future of our conservation land - a third of New Zealand's land mass - is crucial to ensuring New Zealand maintains the clean green brand that underpins our key tourism and agricultural industries," Nicola Vallance said.
3 News / RadioLIVE