Thermage can be very safely performed by trained RNs or estheticians. However, candidate selection is critical with Thermage treatments. I would be more concerned about the experience level of the person evaluating you for treatment - Thermage effects are generally subtle at best in the majority of patients. There are many happy Thermage patients, but those are typically the small subset of people for whom Thermage can produce a satisfactory result. Be wary of any practitioner who promises dramatic change with Thermage treatment, and make sure your provider is well-experienced in Thermage candidate selection. Most patients we see are not good candidates for Thermage only because their expectations way exceed what Thermage treatments can typically produce.