The head of FEMA’s Urban Search and Rescue branch, which runs a network of teams stationed across the country that can swiftly respond to natural disasters, resigned on Monday.

Ken Pagurek had become increasingly frustrated with the Trump administration’s efforts to dismantle the agency, CNN reported.

The head of the Federal Emergency Management Agency's Urban Search and Rescue unit, Ken Pagurek, has left the organization, citing "chaos" at the agency, said The New York Times. Pagurek had served in FEMA's USR division for more than a decade.