Heather Johnston Clinic Coordinator

Heather joins our team with over ten years experience in the medical field. She is a valedictorian graduate of the Pima Medical Institute, where she received training for both Certified Medical Assistant and Limited X-Ray Tech.

Heather is a busy mom of two and her hobbies include: gardening, reading, and hiking. She has a true passion for providing care to the patients she sees every day and is proud to be part of the Park Medical Group family.

Charlotte Skala MA

Charlotte is Erin Cassidy's medical assistant.  She joined Park Medical Group in June 2017 and has been a great asset to our clinic.  Charlotte started her career in healthcare as an Emergency Medical Technician in 2000 in Utah, then becoming a Certified Medical Assistant in 2004.  Charlotte's big personality, kind heart and love of people make her a wonder part of Erin's healthcare team.


Charlotte and her husband have two busy boys.  When not at work, you can find her on the ball field cheering loudly!

Sarha Burkey MA

Sarha joins the clinic as Dr. Nichols' medical assistant with over eight years of experience in the medical field. She was an emergency room tech for four years before becoming a certified medical assistant four years ago. She has a true passion for providing care to the patients she sees every day.

Tiffany Wells, Front Desk


Devyn Greene, Front Desk