handler

n.	1.	one who trains or exhibits animals.
	2.	someone in charge of training an athlete (especially a boxer) or a team.

Noun	1.	handler - one who trains or exhibits animals Synonyms: animal trainer
	2.	handler - an agent who handles something or someone; "the senator's campaign handlers"
	3.	handler - (sports) someone in charge of training an athlete or a team Synonyms: coach, manager

agent, athletic coach, coach, conductor, driller, drillmaster, driver, engineer, functionary, groomer, manipulator, operant, operative, operator, pilot, runner, steersman, trainer