About Us

deRMA Skin Institute is committed to helping you look and feel your personal best by providing the highest level of care for your medical and cosmetic concerns. Trust your skin with  a Board Certified Dermatologist from deRMA Skin Institute – the absolute experts in everything skin. 

Each of our treatment plans  help patients’ deal with skin conditions such as signs of aging, acne, rosacea, hyperpigmentation and over all skin health. We carry premium injectables (Restylane®, Belotaro®, Juvederm®, Botox®), skin care (Vivier® and SkinCeuticals®) and lasers to help better our services.  

Our state of the art clinic offers everything your skin needs to look its best. 

Our highly experienced staff is ready to support you every step through this journey.

It's in our name


Our Physicians

Dr. Dusan Sajic

Dr Sajic is a board certified (Canada and USA) medical and cosmetic dermatologist at derma Skin Institute. He is also an Assistant Professor of Clinical Medicne, Adjunct  at McMaster University, as well as an Associate Investigatory with Probity Medical Researc

Dr. Anastasia Shamsuyarov

Dr. Gustavo Rubio

Dr. Gustavo Rubio is a board certified dermatologist in Canada. He completed a residency program in dermatology at the University of Toronto. He also completed a two-year clinical fellowship in paediatric dermatology at the Hospital for Sick Children - University of Toronto. He has published scientific articles on biologic medications for the treatment of psoriasis, paediatric dermatology including congenital ichthyoses and atopic dermatitis, and also on tropical dermatology. His clinical interests include skin cancer, acne, atopic dermatitis, psoriasis, vascular tumours and malformations, and congenital skin diseases. He is a sub-investigator with Probity Medical Research. He was the leader of a health promotion and disease prevention program for two years. He enjoys spending time with his family, reading about world history and astronomy, and watching classic movies.

Our Team


Alexis Pantaleon


Natasha Germanakos

M.Sc., Licensed Paralegal - Cosmetic Strategist & In House Paralegal

Sarah Shields

customer care coordinator

Carolyn Worndl

Nurse practitioner

Catarina Monico

medical office administrator
image003 (1)

Shewa Olaiya

Administrative assistant

Schedule a Cosmetic Consultation

Maddie Lawlor
I last came in for my consultation back in December and immediately felt welcomed. The clinic is very clean and modern. It can be busy but to me I took that as a positive sign, that just made me feel like I had made the right choice as a busy clinic means they’re doing something right. Since my skin is something I tend to be insecure about, I’m always a little tentative talking about it or having it looked at. However, my experience here made me feel so comfortable. I felt that Dr. Sajic actually listened to what I was telling him and helped me find a solution that was best for both my skin and my routine. I didn’t feel rushed and was never pressured to purchase products I didn’t need, something that I find has always happened with other doctors I’ve seen. The clinic staff are not to be forgotten either, from the second I walked in to the second I left they made the experience so much better. Big thanks to the team here, I will definitely be coming back!
Toula Sotirakos
Extremely helpful and friendly staff and trustworthy doctors! At the end of my appointment, I purchased a Vivian Kit and I love the results I’ve seen on my skin! Fantastic clinic, highly recommend 👍
Yvey Junk78
Dr Dusan is amazing and his staff are absolutely wonderful. He is the smartest most skilled skin doctor I have ever been to. Not only did he find a treat three skin cancers. I don’t even have scars to show for it. He’s extremely personable with an excellent bedside manner. We are incredibly fortunate to have him in Guelp
Kayleigh Bell
I have had the most positive experience at Derma Skin Institute! Dr. Sajic and the nurses treat all their patients with the most respect and care. I have seen a number of dermatologists over the past 10 years and I can honestly say that this facility and the staff are the most top notch. They have all the latest technology and Dr. Sajic is constantly educating himself and his patients. I would highly recommend this facility to all my family and friends.
Close Menu