Tasmania's Parks and Wildlife Service is looking to absorb a $2.5 million funding cut, but there are fears that job losses would hurt world heritage plans.

An internal email has been leaked, outlining six strategic options for finding savings.

It covers ways to manage redundant employees, reviews of agency services and ways to re-profile and redesign the workplace.

The public sector union's Tom Lynch has commented on the email, revealed by the ABC.

“Look I understand that across the board this represents about a 10 per cent cut in the staff of parks and wildlife and that will really hurt,” he told reporters.

“[Public servants] are saying to us tracks will need to be closed, parks will need to be closed, there'll be greater complaints from people about the fact bins and toilets don't get maintained the way they should.”

The threat of job cuts comes just a week after the Tasmanian Government put out a draft plan for private development of some World Heritage Areas. 

National Parks Association spokesperson Nick Sawyer said there was already enough strain on the organisation, and that he could not see “how it's going to cope with further staff cuts”.

Parks and Wildlife staff have four weeks to apply for a voluntary redundancy, after which the department could announce positions to be cut.

Tasmania’s Environment Minister Matthew Groom says Parks and Wildlife will still be able to deliver its core business after the cuts.