From DoD...
Individuals eligible to receive COVID-19 vaccines administered by DoD are as follows:
1. Service members on active duty and in the Selected Reserve (including National Guard personnel) are eligible and encouraged to receive COVID-19 vaccines at military medical treatment facilities (MTFs) or other DoD vaccination sites, as identified by the Military Departments. Service members who are not able to access a DoD vaccination site and elect to receive the COVID-19 vaccine through non-DoD channels must provide documentation of receipt of the vaccination to their unit for documentation in appropriate medical readiness systems.
2. Dependents of active duty Service members, retirees, and other eligible DoD beneficiaries are eligible to receive COVID-19 vaccinations and encouraged to access COVID-19 vaccines through existing processes at MTFs or through the private sector care component of TRICARE.
3. Subject to direction by the Military Departments, other DoD Components, or Office of the Secretary of Defense (OSD) Components concerned, and in accordance with reference ( c ), DoD civilian employees, who are not otherwise eligible DoD beneficiaries, are eligible to receive the vaccine, and select contractor personnel who usually receive influenza vaccines as part of a DoD occupational safety and health program (e.g., health care workers, maintenance depot workers), and who are not otherwise eligible DoD beneficiaries, may be offered COVID-19 vaccines at DoD vaccination sites. Follow-on care (other than the administration of a second vaccine dose) will be provided through such individuals' existing health care plans or personal health care providers. The Military Departments or DoD or OSD Components may request, through the Assistant Secretary of Defense for Health Affairs, that COVID-19 immunizations be offered to additional DoD contractor employees that provide mission-essential critical capabilities.