ECC is performing a multi-phase, high-visibility project to construct a new Master Time Clocks and Operations Facility, as well as execute renovations to surrounding buildings imperative to the clock and astronomy mission. The 14,951-square-foot facility is located in a highly secured and historic site. The project is designed and executed to respect the historic and architectural significance of the 1891 Richard Hunt design while adding the new building drawing from and blending into the environment. The Master Clock can maintain time with an accuracy of 10 one-billionths of a second and are essential for Department of Defense Global Position Satellites. Due to the critical nature of this project, ECC prioritized extensive client and stakeholder partnering efforts to preserve and protect the mission.