Up to 10,000 HSE support staff who are threatening to go on strike.
Workers, including health care assistants, maternity care assistants, laboratory aides, surgical instrument technicians, chefs, porters and household and catering employees, are planning the 24-hour strike in a dispute over pay.
The action is planned at 38 of the country's biggest hospitals.
The dispute centres on the Government’s commitment to carry out a job evaluation scheme for these workers under the last Public Service Stability Agreement.
This evaluation was to ascertain where and how job roles had changed and if remuneration should be increased to match any changes.
The scheme revealed that skill levels in the above jobs have increased significantly over the last nine years. It, therefore, found that staff are entitled to an increase in pay of up to €3,000 in certain circumstances.