Wrangler Co-ordinator

Supplies horses, cattle & other animals, wrangler personnel and livestock equipment to production companies. 

Wrangler - A person who is responsible for the care and control of the animals and equipment  on set.

Stunt Co-ordinator / Stunt Performer

A stunt performer who specifically takes the part of another actor for a stunt. Stunt doubles rarely speak, are typically chosen to resemble the actor that they are replacing as much as possible.

Jamie primarily does stunt work related to equestrian skills.