What is a "Hydrotherapy Technician"?
Do you sell or service spas?
IMO,
if you sell Spas, you are a sales person,
if you service spas, you are a service person,
if you do both, you may be dangerous.
if you are licenced and qualified as an electrician and/or a millwright or similar, you may be a technician.
If you work at Home Depot, you are an associate.
OK, I'm ready to get pounced on.
Steve
BTW Welcome