U.S.A has seven uniformed services. That includes the army, navy, air force, marines, and also the National Oceanic and Atmospheric Administration Commissioned Corps. According to wikipedia:

The NOAA Commissioned Corps, established in 1917 as the Coast and Geodetic Survey Corps, and then as the Environmental Science Services Administration (ESSA) Corps from 1965-1970, traces its roots back to the former U.S. Coast and Geodetic Survey, which dates to 1807 under President Thomas Jefferson. Coast and Geodetic Survey officers were commissioned so that under the laws of war, they could not be executed as spies if they were serving as surveyors on a battlefield.

Ranks go as high as Vice Admiral, although no one at NOAA currently holds that rank. Perhaps if we finally go to war on climate change?

Other U.S. uniformed services: the Coast Guard and… United States Public Health Service Commissioned Corps, hence the position of Surgeon General (who is actually a Vice Admiral).