Phyllis L. Bayer's resignation comes at a time of mounting complaints about black mold and other poor conditions in privatized housing at military bases.
The annual HillVets list highlights active-duty personnel, veterans and military advocates who have proven themselves to be invaluable members of the military community.
Service leaders made the announcement on the eve of a hearing when they will answer questions about the military's accountability in providing safe housing.
The U.S. has been providing lethal aid in the form of Javelin anti-tank missiles to Ukraine since May, and Russian armor is reportedly deterred by the investment.