infinity Team


Registered Nurse BScN

Kristy has been a nurse for 17 years she has been focused on aesthetic injections since 2016. Her lifelong dream has been to create a space with all of her favourite services and products in an environment that she would love to come to as a customer and experience herself. Infinity Cosmetic Clinic is the fruition of that dream.

She graduated from Ryerson University with a Bachelor of Science Degree in Nursing. Her career started in the hospital then progressed into the Pharmaceutical sector then eventually into the aesthetic field where she found her true dream and passion.

Kristy believes that you only have one chance to look after your skin and now is the time. She believes in the motto that we are all going to age, so let us age as gracefully as possible. She is passionate about her work and loves to help others feel more confident in their own skin. She feels your skin represents how you nourish your body and feels you only have one chance to nourish the skin you are in forever. Kristy’s personality traits exhibit what it means to be a quality injector. Not only is she skilled at what she does but she believes in listening to her patients, supporting their desires, providing health teaching, while creating a natural youthful result. She believes in a “less is more” approach!

Kristy is also a National Clinical Trainer for Cartessa Aesthetics throughout Canada she trains nurses, physicians, nurse practitioners and other professionals on safe effective use and technique of medical laser devices. Kristy grew up in Cambridge Ontario. She has a son named Chase, a daughter named Kylee, a Boston Terrier and the most supportive husband. She is happiest in the country, listening to country music, having a bomb fire, and being with her family. She is a foodie who loves a good skincare regime. She enjoys wine, travelling and most of all assisting others to feel like the best version of themselves.


BSc. M.D.

Dr. Randi Stern is a distinguished member of The College of Physicians and Surgeons of Ontario and is a graduate of The University of Toronto’s Medical School. Prior to that, she completed an Honours Bachelor of Science with High Distinction. Her accomplishments are many. After completing a Surgical Internship at University of Toronto’s Toronto Western Hospital, where she was the only female resident that year, Dr. Stern was invited to join the prestigious Department of Cardiovascular Surgery, Toronto General Hospital, University Health Network.
She served as a Cardiac Surgical Associate from 1993 to 2005 when she left to care for her ailing father. During her time as a Cardiac Surgical Associate, she participated in daily surgeries including bypasses, open heart valvular surgeries as well as heart transplants.

Dr. Stern began her work in the field of Aesthetic Medicine in 1995, and has trained extensively. As Medical Director, Dr. Stern completes a thorough medical history and examines each patient. This is to assess the patient’s eligibility for treatment. In addition, each patient is educated on all procedures of interest. Once it has been determined that the patient is a candidate for treatment,an informed consent is obtained. All possible risks and side effects are reviewed and thorough post-treatment instructions are explained. Patients can discuss all their questions and concerns with Dr. Stern prior to treatment. Dr. Stern is on call and is always available for our patients, should the slightest need arise.



Susan Jezerinac is one of Canada’s leading cosmetic Nurse Practitioners.
Susan began her undergraduate studies at the British Columbia Institute of Technology and received her Master of Science and her Primary Health Care Nurse Practitioner Certificate at McMaster University in Hamilton. She is certified by the College of Nurses of Ontario. In addition to her private practice, Susan Jezerinac has been on staff for over 20 years in the Emergency Department at Trillium Health Partners in Mississauga.

SUSAN JEZERINAC - Infinity Cosmetic Clinic