wrangler

Short definition from Wiktionary

Noun

1. 1
   Someone who wrangles or corrals.
2. 2
   A brawler or disputant.
3. 3
   A cowboy who takes care of saddle horses.
4. 4
   A cowboy who takes care of tourists.
5. 5
   An animal handler or trainer.
6. 6
   A student who has completed the third year of the mathematical tripos with first-class honours.
7. 7
   A special education teacher.
8. 8
   A groom.