July 12, 2013 12:00 PM, EDT

Napolitano Stepping Down as DHS Chief

Janet Napolitano is resigning from her position leading the Department of Homeland Security, the Associated Press reported Friday.

Napolitano has served as secretary of homeland security since the day after President Obama took office in 2009 and is only the third person to lead the agency.

DHS includes the Transportation Security Administration, established after the Sept. 11, 2001, terrorist attacks to oversee the security of passenger and freight transportation.

Napolitano is leaving to become president of the 10-campus University of California system, AP said, citing DHS staff.

Before taking the DHS post, Napolitano was the governor of Arizona from 2003 to 2009.