| Title | Administrator |
| Start Date | 2019-09-26 |
| End Date | 2021-01-12 |
| Is Current | no |
| Executive | yes |
| Notes | served briefly as Acting Secretary of Homeland Security under President Trump.[1] Gaynor previously served as administrator of the Federal Emergency Management Agency (FEMA). He was appointed as Acting Administrator by President Donald Trump on March 8, 2019, and became Administrator on January 16, 2020. Gaynor assumed the role of Acting Secretary of Homeland Security[2] on January 12, 2021, upon the resignation of Chad Wolf. |