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Kierstyn Diaz, Senior Medical Aesthetician

Conveniently located to serve New York City, Tribeca, and The Upper East Side

Kierstyn has 16 years of extensive experience, culminating in a highly personalized approach to skincare. Her profound enthusiasm for the science of skincare has honed her exceptional proficiency in advanced laser treatments. Her specialities being skin resurfacing and tightening. Her unique strengths lie in tailoring cutting-edge aesthetic procedures using the industry’s most advanced technologies. Kierstyn derives immense satisfaction from building connections with her clients and helping them achieve their beauty goals. As a rigorously trained esthetician, she is dedicated to selecting the appropriate therapies for each individual client. She remains committed to staying abreast the latest advancements in the industry and offering a variety of options for clients. Prior to joining TMS, Kierstyn gained extensive experience by working closely with renowned dermatologists and plastic surgeons in New York.


She firmly believes in celebrating the uniqueness of each person’s skin and avoiding a one-size-fits-all approach in skincare and beauty standards. Instead, it’s about promoting inclusivity, self-acceptance, and creating treatment plans that cater to the individuality of each person’s skin.


Education & Training

Western Suffolk BOCES


Ultherapy, CoolSculpting Elite, Hydrafacial