Commander-in-Chief of the Federation Starfleet

The Commander-in-Chief of the Federation Starfleet, also known as the C-in-C and as Commander Starfleet, is the Federation Starfleet flag officer who is in charge of the overall organization. The C-in-C serves as a primary military advisor to the Federation President and Council, and has operational authority over the whole of the Federation Starfleet.

In 2293, the C-in-C was Fleet Admiral William Smilie. (Star Trek VI: The Undiscovered Country.)