Who are the previous directors of the dept of homeland security?

The Department of Homeland Security (DHS) has had several directors since its creation in 2003. Notable figures include Tom Ridge, the first secretary, who served from 2003 to 2005, followed by Michael Chertoff (2005-2009), Janet Napolitano (2009-2013), and Jeh Johnson (2013-2017). More recently, John F. Kelly served from 2017 to 2019, followed by Kirstjen Nielsen (2017-2021) and Alejandro Mayorkas, who has been in office since February 2021.