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Nurse Injector in San Diego, CA
Kassandra "Kass" Marin, RN, BSN
Soléa Aesthetics & Wellness was founded by Nurse Kass Marin after years of caring for patients across clinical settings and witnessing the importance of care that is personal, honest, and safe. Her vision: a medical aesthetics and wellness practice where clients feel heard — not rushed, pressured, or sold a treatment they do not need.
Her Journey
From the Bedside to the Beauty Room
Every step of Kass's path shaped how Soléa treats its clients — clinically, honestly, and with an artist's eye.
01
Registered Nurse
Years of bedside care across clinical settings — where assessment, safety, and honest communication are not marketing words, they are the job.
02
The Beauty Industry
Working within the aesthetics world revealed both its artistry and its sales pressure — and made clear which side of that line she wanted to practice on.
03
Permanent Makeup Artistry
A PMU background trained her eye for symmetry, color, and proportion — precision measured in millimeters, where "close enough" is never enough.
04
Why Soléa Exists
Soléa brings those worlds together: clinical judgment from nursing, artistry from PMU, and a promise that no client will ever be sold a treatment they do not need.
our medical director
Dr. Guillermo Castillo, MD
Dr. Guillermo Castillo is board-certified in Family Medicine. He completed residency at The University of San Diego Medical Center. His areas of clinical expertise include preventive and integrative medicine, as well as Aesthetics.
In nearly 20 years of practice, Dr. Castillo has amassed experience in every aspect of the health care delivery system. His strategic expertise lies in the integration of genomics and technology to deliver individually tailored health solutions to everyone.
Luxury Without Exclusion
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our mission
Helping People Feel Confident in Their Skin
Aesthetic medicine should feel like luxury and act like medicine — welcoming to every face, every skin tone, and every budget. No pushed menus. No trend chasing. No one-size-fits-all treatment plans. Just thoughtful clinical care, honest recommendations, and results designed to help you feel like the best version of yourself.
Education
You will always understand what is being done, why, and what to expect — before anything happens.
Integrity
If a treatment will not look natural on you, Nurse Kass will tell you before you spend a dollar.
Inclusivity
Every face, every skin tone, every gender, every age. Protocols are adapted to you — never the reverse.
Natural Results
The best compliment is "you look amazing" — never "what did you have done?"
Come Meet Kassie in Person
Your first visit is a conversation, not a sales pitch. Tell us your goals and Kass will build a plan that fits your face, your lifestyle, and your budget.
