resized_300x218_dr_tonyDr. Tony Pacevicius
Dr. Pacevicius founded Halton Hills Veterinary Clinic (HHVC). He has been a veterinarian for almost 40 years after graduating from the University of Guelph. His love for animals and the outdoors extends into his hobbies. When not in the clinic you will find him outside; fishing, skiing, or boating.

As leader of HHVC, Dr. Pacevicius’ passion for pet care extends to all staff including technicians and specialists and staff veterinarians.

Dr. Pacevicius has been married for 41 years to Lilija and has three grown children.
When he is not at the clinic he spends his time playing guitar and spending time with his dog Humber. A passionate fishermen, he is happiest when on the water.

dr_rothman_wielingaDr. Aviva Rothman-Wielinga
Dr. Aviva Rothman-Wielinga has been a part of the Halton Hills Veterinary Clinic family since 1995. She considers it a privilege to be a participant in the care of our client’s furry family members. It is Aviva’s goal to make sure that the human-animal bond is protected so that our clients can know that their pets are well cared for. She loves hearing her client’s stories (animal and human!), connecting with their two legged children, and sharing her own stories with her clients. Over the years many youth have worked alongside Aviva as she has mentored those who have shown a desire to become veterinarians themselves. This privilege of speaking into the lives of young people brings her great joy.

Georgetown is her home where she lives with her husband and her own furry family members. In her spare time you will find Aviva directing youth ministry at her church where she attends to the soul care of teens.


 JoAnne Patterson Ms. Patterson has been with Halton Hills Veterinary Clinic for longer than anyone can remember (including her). JoAnne assumes the role of Hospital Administrator and Chief Technician. Her high energy, passion for pets and customer service is contagious. She has been a Certified Registered Veterinary Technician for 30 years.
 Genevieve Leslie Part-time Receptionist
 Dianne McBean Receptionist
 Melannya Mychajlowska Full-Time Reception/Vet Assistant