She became acting Surgeon General of the United States Army for nine months following the 20 March 2007 retirement of her predecessor, Kevin C. Kiley, due to fallout from the Walter Reed Army Medical Center neglect scandal.

[4] Pollock received a Bachelor of Science degree in Nursing from the University of Maryland, Baltimore.

Pollock's military education includes the Department of Defense CAPSTONE Program; the Senior Service College at the Industrial College of the Armed Forces; the Air War College; the Interagency Institute for Federal Health Care Executives; the Military Health System CAPSTONE program; the Principles of Advanced Nurse Administrators; and the NATO Staff Officer Course.

Her past military assignments include Special Assistant to the Surgeon General for Information Management and Health Policy; Commander, Martin Army Community Hospital, Fort Benning, Ga.; Commander, U.S. Army Medical Activity, Fort Drum, N.Y.; Staff Officer, Strategic Initiatives Command Group for the Army Surgeon General; Department of Defense Healthcare Advisor to the Congressional Commission on Service Members and Veterans Transition Assistance; Health Fitness Advisor at the National Defense University; Senior Policy Analyst in Health Affairs, DoD; and Chief, Anesthesia Nursing Service at Walter Reed Army Medical Center, Washington, D.C. Pollock's awards and decorations include the Army Distinguished Service Medal, Legion of Merit (with 2 oak leaf clusters), the Defense Meritorious Service Medal, the Meritorious Service Medal (with 4 oak leaf clusters), the Joint Service Commendation Medal, the Army Commendation Medal, and the Army Achievement Medal.

[5] Kors article stated that the Surgeon General's office then closed the review, without seeking information from more objective sources, leading to criticism of Pollack by the Iraq War Veterans Organization[6][7] and Veterans for America[6] In the 2024 United States presidential election, Pollock endorsed Kamala Harris.