The Social Security Scheme was hit by industrial action on Wednesday morning after around seven to eight management level staff called in sick.
Workers at the statutory institution told The Daily OBSERVER that they were caught completely off guard by the industrial action but nonetheless continued work as usual.
Reports reaching this newspaper suggested the sickout was triggered by disputes over contract negotiations.
Attempts to contact staff members at the management level proved unsuccessful. Members of the Social Security Board could not be contacted either.
It is not clear whether the sickout will continue today.
The managers are represented by the Antigua & Barbuda Workers Union, and a promised statement from General Secretary David Massiah on the matter did not materialise up to press time.