Natural. Timeless. Effortlessly You.

Here, results are never overdone—only refined, balanced, and designed to complement who you already are.

Welcome to MIA Medical Aesthetics

Natural. Timeless. Effortlessly You.

Welcome to Mia Medical Aesthetics, a boutique medical aesthetics clinic located inside Mia Bella Suites on Upper Wellington in Hamilton, Ontario. Founded by Sierra Miranda, RPN, Mia Medical Aesthetics is dedicated to enhancing natural beauty through thoughtful, personalized, and medically led aesthetic care.

Where Expertise Meets Artistry

With a background as a Registered Practical Nurse, Medical Aesthetician, and Master Lash Artist, Sierra has been immersed in the aesthetics industry since 2019 and opened Mia Medical Aesthetics in 2020. Her clinical knowledge, artistic eye, and passion for education allow her to create results that are both beautiful and safe, with long-term skin health always at the forefront.

Every face tells a story. Sierra’s role is not to change it—but to enhance it in a way that feels natural, confident, and aligned with your lifestyle.

Shop Alumier

Alumier is a medical-grade skincare line rooted in clean science and clinical results. Formulated with proven active ingredients, Alumier targets skin concerns at the source while supporting long-term skin health and balance.

  • Improves skin tone, texture, and overall radiance
  • Strengthens the skin barrier with long-lasting hydration
  • Clean, customizable formulas suitable for sensitive skin
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Daphne Shamoun profile picture
Daphne Shamoun
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Absolutely obsessed with my lashes! Sierra pays so much attention to detail and makes sure everything looks perfect. They last forever and always look full but still natural. I won’t be going anywhere else!!
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Daniella s
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Sierra is the best!!! I had my lashes done for my vacation and they were amazing. Barely any fell out and I was on the beach, in the water and humidity and they still look great two weeks later! She is extremely kind, professional and knowledgeable. So happy I found a lash tech like her 💕
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Milton Sousa
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I can’t recommend Mia Medical Aesthetics enough! From lashes to facials to Botox, everything is done with such precision and care—it’s truly perfection every time. You can tell how hard Sierra works every single day to satisfy her clients, and on top of that, she’s one of the kindest, most genuine people you’ll meet. Personally, I go to Sierra for my facials, and my skin always comes out absolutely glowing. She takes the time to share the best tips and recommendations so my skin can continue to thrive even after I leave. That level of care and knowledge makes such a difference. No matter what treatment you get, you walk out feeling confident, refreshed, and taken care of. If you’re looking for amazing results and an even better experience, Mia Medical Aesthetics is the place to go!
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Tyler Hand
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It’s a pleasure being Sierra’s medical director. She’s knowledgeable, conscientious, and consistently prioritizes patient safety and education. Her assessments, documentation, and follow-up are excellent, and her professionalism is top-tier. Highly recommend!
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Es Molina
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Mia was so attentive to detail and professional, she curated such a beautiful wet set that complimented my eye shape and I couldn’t be happier ! She truly listens to what her clients wants / any concerns, I’ve gotten so many compliments and the lash retention has been amazing! Couldn’t recommend her enough to all my friends, family and coworkers !!!
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Emily Rajczak-McGuigan
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Mia is the absolute best ! She takes her time and pays attention to detail. She has me feeling and looking fabulous every single time .. I notice a huge difference in the care she takes with her clients and her work appose to other places I have been too. I’m hooked !!
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Chelsea L
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I couldn’t be happier with my experience at Mia Medical Spa! I got my lashes done for a bachelorette party and wanted something that felt natural and casual during the day but still elevated enough for the nighttime events. Sierra created a custom set that beautifully accentuated my eye color, looked amazing, and lasted so well. I would absolutely recommend her to anyone!
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Nora Katbi
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Absolutely love coming to Mia Medical Aesthetics! Nurse Sierra is professional, knowledgeable, and so detail-oriented. My skin has never looked better and my lashes are always perfect. Highly recommend her for anyone serious about great results!
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Kristen Hatt-Robertson profile picture
Kristen Hatt-Robertson
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I’m so happy I found Sierra! She’s amazing at lashes and makes the whole process so calming and comfortable. I didn’t even give her a picture, just told her I wanted to see them but not too heavy, and she worked her magic. She absolutely killed it! It’s been over a week and my lashes still look amazing! Cant wait for my refill :)
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Brittany Green
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I am so so happy with my lashes!! Sierra absolutely killed them. I didn’t even have to show her a picture I just explained what I wanted and she made the magic happen! I felt so comfortable and the environment was so friendly and welcoming. I cannot wait for my fill!! I attached a photo of my brown hybrids :)