The 270 staff at West London YMCA have been told that any of them could be made redundant as the charity reviews its structure in a bid to cut costs.
The organisation is reviewing staff levels in all of its departments, and management and front-line workers could have their jobs cut under the restructure, staff were told last week. However, it is unclear how many jobs could go.
Clare Scott Booth, chief executive of West London YMCA, which is based in Ealing, said staff were being asked to offer their own money-saving ideas.
"We need to cut costs," she said. "We are being honest with our staff and involving them from the beginning in the restructuring of the charity. We need to make sure we survive the recession."
A decision is expected by the end of March.