Katherine Grace Hammack (born November 23, 1959)[1] is the former United States Assistant Secretary of the Army (Installations, Energy and Environment), having assumed office on June 28, 2010, and completing her appointment on January 20, 2017.
She then returned to her previous employer, Ernst & Young LLP, as executive director in the Government and Public Sector Advisory practice.
[2][3] Born Katherine Grace Dellett in Washington, D.C., she was educated at Oregon State University, earning a bachelor's degree in mechanical engineering with a specialization in HVAC in 1981.
In January 2010, President of the United States Barack Obama nominated Hammack to be Assistant Secretary of the Army (Installations, Energy and Environment) and, after Senate confirmation, she was sworn into office on June 28, 2010.
On August 7, 2017, it was announced that she would return to her previous employer, Ernst & Young LLP, as executive director in the Government and Public Sector Advisory practice.