The Department of Defense is marching toward Zero Trust, following review of their implementation plans by the Defense Department (DoD) Zero Trust Portfolio Management Office (ZTMPMO) in fall 2023. Their progress will not be in lockstep, but their objectives are aligned. In this keynote address, Randy Resnick, Chief Zero Trust Office of the Department of Defense, will review the process and lessons learned, outline agency priorities for 2024 as adversarial behavior escalates, and provide a candid assessment of the obstacles that must be overcome to reach Target Level Zero Trust across the DoD by 2027.