CAT staff fear jobs could go in review.
The centre, which opened in an old slate quarry in 1974, holds courses and welcomes 50,000 visitors each year.
It employs over 100 people and in the holiday season employs more.
Now, because of the world-wide economic situation, the organisation has decided to carry out restructuring review.
The centre's management board is discussing plans to restructure CAT, and has not ruled out the possibility of "some" redundancies as a result. Claims the entire workforce - with the exception of the management board - had been put on redundancy notice were denied by the organisation, as was a claim that managers had recently received a substantial pay increase.
CAT Spokesman Alex Randall said: "Like many charities CAT is being affected by the global recession.
"We're doing a review of our actions to try and look at the how the organisation responds to the recession.
"The review will be ready in about two to three weeks.
"We are currently looking at restructuring parts of the organisation in order to better adapt to the changing financial climate and we are exploring a variety of measures that will reduce our running costs.
"We will continue to provide our outstanding educational courses, inform, inspire and enable solutions for sustainability, work on our ground breaking projects such as zero carbon Britain 2030 and be an important tourist attraction in Wales."