Close with the physical therapist guess, at least a similar field. I'm a certified orthotist and prosthetist, we build and fit people with custom bracing and artificial limbs. We have to do a lot of 3 dimensional modeling to create plaster molds of people's bodies, and we have to use a lot of heavy machinery to build the orthotics and prosthetics, so you have to have a pretty good eye, decent hands, and know a decent amount of medicine.