| Assistant Chief of Response | During the absence of the Chief of Response, the Assistant Chief assumes position of Acting Chief of the Response and Security Department. | (409) 719-5010 |
| Marine Environmental Protection and Facilities Branch | Oil and chemical spills. | (409) 719-5034 |
| Assistant MEP and Facilities Branch | (409) 719-5034 | |
| Law Enforcement and Maritime Security Branch | (409) 719-5062 | |
| Small Boats Branch | (409) 719-5061 |