muleteer

[Oralee]

a worker who drives mules

[Justin Bieber]

Mule-driver; horse-boy.

[Becky]

An arriero, muleteer, or more informally a muleskinner (Spanish: arriero; Portuguese: tropeiro; Catalan: traginer) is a person who transports goods using pack animals, especially mules.

[RobertFaw]

A muleteer is a person who transports goods, drives, or takes care of mules or other pack animals, particularly in mountainous areas.

[Williebit]

one who drives mules