Christopher Paul Maier is an American government official who had served the Assistant Secretary of Defense for Special Operations and Low-Intensity Conflict.

From March 2017 to November 2020 he led the Defeat-ISIS Task Force charged with integrating Department of Defense efforts in the campaign to achieve the enduring defeat of ISIS, until he was asked to resign by the Trump administration after the 2020 United States presidential election.

[3][4] Maier was appointed as the Deputy Assistant Secretary of Defense for Special Operations and Combating Terrorism in the Obama administration.

[2] In January 2021, it was reported that Maier would be brought back by the Biden administration as the acting principal deputy assistant secretary of defense for special operations and low-intensity conflict.

[6] On April 23, 2021, President Joe Biden announced Maier as his nominee to be the Assistant Secretary of Defense for Special Operations and Low-Intensity Conflict.