| Joss Hayes | |
 Major Hayes in 2153 | |
| Species: | Human |
| Gender: | Male |
| Eye color: | brown |
| Hair color: | black |
| Died: | February 13, 2154 |
| Affiliation: | United Earth, Military Assault Command Operations |
| Family | |
| Spouse(s): | unknown wife |
| Career | |
| Occupation: | officer, MACO |
| Final Assignment: | MACO detachment commander, Enterprise (NX-01) |
| Rank: | major |
| Insignia: |   
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- "We're all part of the same crew, no matter which uniform we wear."
- — Major Joss Hayes, to Malcolm Reed
Joss Hayes (also known as Jeremiah Hayes) was a male Human and the leader of the MACO squad that was assigned to the Enterprise from 2153 to 2154 during the Xindi crisis. He died during a mission to save Ensign Hoshi Sato from the Xindi.
Biography[]
Hayes came from a military family that dated its military service all of the way back to Earth's second world war. His father prepared him all of his life for a military career, and eventaully he graduated from West Point and became an officer of the Military Assault Command Organization.
A family man himself and veteran of pirate-fighting in the Janus Pirate Wars, Hayes was selected to lead the MACO unit of thirty-six soilders assigned to assist the Enterprise in dealing with the Xindi threat following the attack of 2153. (ENT novel: Last Full Measure; ENT episode: "Hatchery")
One of his missions during the Xindi conflict was accompanying Captain Jonathan Archer to the planet Kaletoo, following up on a lead on the Xindi.
Hayes was killed near the end of the Xindi mission on an operation to rescue Ensign Hoshi Sato from a Xindi-Reptilian vessel during the assault on the Xindi weapon that has been launched to destroy Earth by the Reptilians and Insectoids. (ENT novel: Last Full Measure; ENT episode: "Countdown")
- Hayes' first name was established to be Jeremiah in the Star Trek: Customizable Card Game; the novel Last Full Measure calls him Joss Hayes. Actor Stephen Culp had previously speculated in an interview that the character's name might be Jeremiah or Jay.
Personality[]
Hayes was a hardened military man with extreme discipline. He was dedicated to the chain of command, and preferred to maintain a certain level of consistency in his life. Hayes was a graduate of the military academy at West Point, New York, and had undergone lunar survival training, an extremely intense ordeal, by the time he served on Enterprise. (ENT episodes: "Harbinger", "Hatchery")