According to reports in the Cornish press, staff have been told that a consultation process will begin tomorrow (Wednesday). The organisation is reported to have 430 full-time equivalent staff.
The latest job cuts follow a smaller number of redundancies in the first half of 2012 which were blamed at the time by Eden Project representative Ben Foster on the effects of the tough economic climate.
Although visitor numbers rose in 2011, they fell six per cent to 1.028 million in 2009 before rising 0.1 per cent to 1,001,774 in 2011, according to the Association of Leading Visitor Attractions.
Eden's numbers peaked at 1,832,482 in 2002, a year after the £90m horticulture attraction's opening.
Founder Tim Smit's initial estimate for visitors was 750,000.