Deputy Chief Executive Officer of the Office of Disaster Preparedness and Management Dave Williams has resigned with immediate effect.
Confirmation of his departure came from National Security Minister Edmund Dillon in a short message this evening.
A statement from the National Security Ministry said it is with immediate effect, but no further details were given about the reasons for his resignation.
However, Williams and the ODPM have faced public criticism over the agency's response to devastating flooding across the country last week.
At a news conference held last Friday, Williams admitted there was a breakdown in communications which led to the very delayed response by the ODPM.
Over the weekend, the prime minister scolded the agency for what he called its poor performance saying government will be taking firm action to review its operations.