Markwayne Mullin has been named as the incoming Secretary of the Department of Homeland Security in the Trump administration. The appointment positions Mullin to oversee one of the federal government's largest departments, which encompasses immigration enforcement, cybersecurity, and domestic security operations.

Mullin will inherit leadership of an agency that has been central to immigration policy debates and enforcement operations. The Department of Homeland Security oversees multiple agencies including Immigration and Customs Enforcement, Customs and Border Protection, and the Transportation Security Administration.

As the incoming secretary, Mullin will be tasked with implementing the administration's immigration and border security policies. The department has historically played a key role in deportation operations and border enforcement activities under various administrations.

The appointment comes as the Trump administration prepares to take office and establish its cabinet leadership team. Mullin's confirmation will require Senate approval before he can officially assume the role of leading the department's approximately 240,000 employees.